worldcat.org

WorldCat is a union catalog that itemizes the collections of 17,900 libraries in 123 countries and territories that participate in the OCLC global cooperative. It is operated by OCLC, Inc. The subscribing member libraries collectively maintain WorldCat's database, the world's largest bibliographic database. OCLC makes WorldCat itself available free to libraries, but the catalog is the foundation for other subscription OCLC services. WorldCat is used by the general public and by librarians for cataloging and research. More information...

Multilingual Wikipedia

In June 2020 the website worldcat.org was on the 68th place in the ranking of the most reliable and popular sources in multilingual Wikipedia from readers' point of view (PR-score). If we consider only frequency of appearance of this source in references of Wikipedia articles (F-score), this website was on the 83rd place in June 2020. From Wikipedians' point of view, "worldcat.org" is the 79th most reliable source in different language versions of Wikipedia (AR-score).

The website is placed before bloomberg.com and after lemonde.fr in multilingual PR ranking of the most reliable sources in Wikipedia.

PR-score:
68th place
362,409,394
-60,281,288
AR-score:
79th place
46,688,909
+2,511,235
F-score:
83rd place
169,394
+8,730

Spanish Wikipedia (es)

PR-score:
15th place
95,867,953
-25,621,795
AR-score:
35th place
6,647,687
+257,159
F-score:
44th place
16,750
+608

English Wikipedia (en)

PR-score:
276th place
74,379,712
+13,965,043
AR-score:
184th place
9,668,393
+1,206,180
F-score:
112th place
31,323
+2,899

French Wikipedia (fr)

PR-score:
26th place
55,910,842
-13,799,633
AR-score:
27th place
8,650,567
+185,484
F-score:
25th place
25,524
+1,122

Portuguese Wikipedia (pt)

PR-score:
28th place
24,311,103
-1,113,090
AR-score:
73rd place
1,891,301
+102,163
F-score:
50th place
7,668
+429

Italian Wikipedia (it)

PR-score:
35th place
21,374,238
-12,603,301
AR-score:
60th place
2,873,338
+73,808
F-score:
45th place
8,101
+180

Russian Wikipedia (ru)

PR-score:
132nd place
15,284,813
-5,292,345
AR-score:
178th place
1,130,335
+23,120
F-score:
156th place
4,601
+248

Chinese Wikipedia (zh)

PR-score:
112th place
12,286,426
-1,004,951
AR-score:
156th place
652,105
+13,554
F-score:
105th place
3,544
+110

Japanese Wikipedia (ja)

PR-score:
232nd place
9,830,067
+149,035
AR-score:
315th place
584,201
+42,236
F-score:
250th place
2,438
+125

Swedish Wikipedia (sv)

PR-score:
30th place
5,069,917
-3,462,062
AR-score:
48th place
1,724,077
+66,968
F-score:
71st place
4,169
+206

German Wikipedia (de)

PR-score:
424th place
4,764,474
+595,481
AR-score:
370th place
881,916
+33,583
F-score:
247th place
2,597
+42

Indonesian Wikipedia (id)

PR-score:
18th place
4,627,653
+309,014
AR-score:
26th place
633,264
+44,504
F-score:
29th place
4,126
+253

Arabic Wikipedia (ar)

PR-score:
41st place
4,582,795
-70,918
AR-score:
56th place
1,342,299
+43,768
F-score:
49th place
5,808
+145

Dutch Wikipedia (nl)

PR-score:
62nd place
4,243,532
+138,276
AR-score:
89th place
778,341
+60,326
F-score:
51st place
2,382
+140

Czech Wikipedia (cs)

PR-score:
50th place
3,482,084
-596,936
AR-score:
80th place
455,321
+40,544
F-score:
65th place
2,251
+111

Korean Wikipedia (ko)

PR-score:
39th place
3,395,287
+3,301
AR-score:
99th place
311,618
+25,368
F-score:
89th place
1,100
+182

Catalan Wikipedia (ca)

PR-score:
13th place
3,105,942
-2,473,741
AR-score:
18th place
2,676,873
+161,362
F-score:
16th place
10,501
+722

Hebrew Wikipedia (he)

PR-score:
22nd place
2,805,021
-440,402
AR-score:
27th place
935,860
+17,807
F-score:
32nd place
1,852
+61

Ukrainian Wikipedia (uk)

PR-score:
80th place
1,775,854
-2,287,935
AR-score:
106th place
386,100
+10,774
F-score:
92nd place
2,618
+244

Basque Wikipedia (eu)

PR-score:
4th place
1,686,580
-2,007,634
AR-score:
10th place
933,088
+18,322
F-score:
7th place
7,125
+168

Polish Wikipedia (pl)

PR-score:
390th place
1,604,971
-634,967
AR-score:
462nd place
271,737
-9,604
F-score:
329th place
1,631
+19

Greek Wikipedia (el)

PR-score:
51st place
1,457,945
-395,921
AR-score:
55th place
242,139
+3,494
F-score:
30th place
2,277
+81

Persian Wikipedia (fa)

PR-score:
106th place
1,217,185
-134,634
AR-score:
157th place
219,968
+864
F-score:
140th place
827
+1

Romanian Wikipedia (ro)

PR-score:
55th place
1,068,546
+326,713
AR-score:
230th place
57,428
+455
F-score:
200th place
437
+3

Bulgarian Wikipedia (bg)

PR-score:
61st place
970,456
-228,168
AR-score:
113th place
145,446
+735
F-score:
253rd place
215
+1

Serbian Wikipedia (sr)

PR-score:
41st place
891,318
-1,029,141
AR-score:
49th place
328,768
+7,647
F-score:
28th place
2,767
+63

Slovak Wikipedia (sk)

PR-score:
39th place
753,287
-161,248
AR-score:
65th place
109,225
+3,648
F-score:
60th place
528
+39

Hungarian Wikipedia (hu)

PR-score:
180th place
716,532
-436,791
AR-score:
149th place
174,273
+8,953
F-score:
142nd place
773
+33

Finnish Wikipedia (fi)

PR-score:
165th place
653,354
-622,377
AR-score:
202nd place
237,663
+860
F-score:
235th place
894
+10

Simple English Wikipedia (simple)

PR-score:
51st place
501,374
-127,319
AR-score:
109th place
107,963
+2,447
F-score:
165th place
253
+9

Turkish Wikipedia (tr)

PR-score:
386th place
392,716
-120,935
AR-score:
307th place
114,894
+798
F-score:
421st place
279
+8

Vietnamese Wikipedia (vi)

PR-score:
379th place
382,464
-93,026
AR-score:
483rd place
50,229
+1,056
F-score:
302nd place
592
+6

Norwegian Wikipedia (no)

PR-score:
126th place
380,787
-286,678
AR-score:
140th place
258,509
+5,715
F-score:
91st place
1,228
+76

Hindi Wikipedia (hi)

PR-score:
42nd place
265,379
+16,767
AR-score:
82nd place
62,661
+4,633
F-score:
171st place
179
+6

Bengali Wikipedia (bn)

PR-score:
32nd place
265,142
-12,080
AR-score:
58th place
94,674
+2,901
F-score:
70th place
826
+23

Croatian Wikipedia (hr)

PR-score:
180th place
212,121
+40,245
AR-score:
186th place
49,209
+24,874
F-score:
189th place
240
+28

Malay Wikipedia (ms)

PR-score:
77th place
199,465
+68,563
AR-score:
227th place
20,066
+523
F-score:
229th place
224
0

Slovenian Wikipedia (sl)

PR-score:
40th place
197,981
-265,396
AR-score:
62nd place
47,711
+291
F-score:
84th place
306
+1

Macedonian Wikipedia (mk)

PR-score:
27th place
188,448
-124,269
AR-score:
20th place
142,110
+2,229
F-score:
12th place
1,698
+10

Galician Wikipedia (gl)

PR-score:
49th place
99,576
-29,691
AR-score:
48th place
148,737
+2,704
F-score:
52nd place
776
+50

Punjabi Wikipedia (pa)

PR-score:
12th place
77,347
-9,931
AR-score:
130th place
6,026
-18
F-score:
94th place
113
+2

Lithuanian Wikipedia (lt)

PR-score:
200th place
73,701
-78,118
AR-score:
263rd place
20,777
+2,781
F-score:
371st place
45
+5

Javanese Wikipedia (jv)

PR-score:
7th place
71,049
-1,590
AR-score:
8th place
102,782
+1,026
F-score:
4th place
1,605
+30

Danish Wikipedia (da)

PR-score:
620th place
70,571
-16,012
AR-score:
656th place
22,987
+50
F-score:
505th place
111
+1

Bosnian Wikipedia (bs)

PR-score:
98th place
65,288
-64,549
AR-score:
178th place
16,027
+134
F-score:
177th place
89
0

Armenian Wikipedia (hy)

PR-score:
134th place
65,166
-32,776
AR-score:
165th place
40,964
+3,340
F-score:
107th place
883
+59

Thai Wikipedia (th)

PR-score:
1,059th place
65,073
-5,333
AR-score:
1,429th place
8,252
+755
F-score:
609th place
89
+10

Latvian Wikipedia (lv)

PR-score:
148th place
55,832
-92,591
AR-score:
160th place
30,201
+225
F-score:
168th place
154
0

Sundanese Wikipedia (su)

PR-score:
6th place
55,067
+24,311
AR-score:
11th place
20,004
+334
F-score:
18th place
270
+19

Georgian Wikipedia (ka)

PR-score:
200th place
46,645
-22,937
AR-score:
222nd place
13,673
+495
F-score:
251st place
102
+3

Minangkabau Wikipedia (min)

PR-score:
10th place
46,577
+11,794
AR-score:
12th place
7,381
+300
F-score:
10th place
135
+7

Albanian Wikipedia (sq)

PR-score:
103rd place
39,314
-29,054
AR-score:
88th place
19,971
+214
F-score:
111th place
131
+4

Banjar Wikipedia (bjn)

PR-score:
3rd place
34,114
-5,335
AR-score:
6th place
5,562
+600
F-score:
2nd place
71
+14

Afrikaans Wikipedia (af)

PR-score:
93rd place
33,321
-3,779
AR-score:
57th place
33,996
+373
F-score:
27th place
365
+2

Asturian Wikipedia (ast)

PR-score:
161st place
30,573
-9,588
AR-score:
124th place
32,019
+26
F-score:
116th place
519
0

Malayalam Wikipedia (ml)

PR-score:
143rd place
27,958
+2,245
AR-score:
171st place
18,581
+170
F-score:
100th place
276
+6

Marathi Wikipedia (mr)

PR-score:
68th place
24,243
-6,383
AR-score:
85th place
14,592
+16
F-score:
66th place
79
0

Telugu Wikipedia (te)

PR-score:
94th place
24,000
+16,250
AR-score:
195th place
9,248
+951
F-score:
199th place
62
+1

Welsh Wikipedia (cy)

PR-score:
102nd place
21,688
+869
AR-score:
87th place
23,711
+3,282
F-score:
59th place
268
+10

Egyptian Arabic Wikipedia (arz)

PR-score:
66th place
21,487
+57
AR-score:
38th place
27,169
+300
F-score:
21st place
569
+4

Swahili Wikipedia (sw)

PR-score:
44th place
18,560
+3,583
AR-score:
71st place
8,556
0
F-score:
76th place
67
0

Azerbaijani Wikipedia (az)

PR-score:
592nd place
14,485
-8,600
AR-score:
427th place
10,521
+144
F-score:
254th place
125
+3

Esperanto Wikipedia (eo)

PR-score:
130th place
14,002
-9,397
AR-score:
222nd place
15,588
+63
F-score:
141st place
108
+1

Sardinian Wikipedia (sc)

PR-score:
5th place
13,981
-2,525
AR-score:
31st place
1,653
+160
F-score:
14th place
38
0

Tamil Wikipedia (ta)

PR-score:
527th place
11,650
-5,292
AR-score:
342nd place
11,341
+121
F-score:
267th place
132
+2

Irish Wikipedia (ga)

PR-score:
59th place
11,553
-2,198
AR-score:
46th place
16,217
+83
F-score:
18th place
184
+3

Gujarati Wikipedia (gu)

PR-score:
58th place
11,536
+1,263
AR-score:
244th place
2,115
+21
F-score:
118th place
54
0

Urdu Wikipedia (ur)

PR-score:
226th place
11,331
-31,034
AR-score:
164th place
12,780
+173
F-score:
104th place
161
+20

Serbo-Croatian Wikipedia (sh)

PR-score:
640th place
10,685
-7,874
AR-score:
496th place
5,591
+3
F-score:
224th place
135
0

Kurdish Wikipedia (ku)

PR-score:
50th place
10,405
-2,417
AR-score:
217th place
2,459
+286
F-score:
19th place
80
+7

Ilokano Wikipedia (ilo)

PR-score:
62nd place
9,740
+534
AR-score:
511th place
506
0
F-score:
288th place
8
0

Cantonese Wikipedia (zh-yue)

PR-score:
473rd place
9,492
-458
AR-score:
656th place
2,069
+13
F-score:
203rd place
35
0

Estonian Wikipedia (et)

PR-score:
1,073rd place
8,941
-9,445
AR-score:
1,948th place
2,926
+21
F-score:
989th place
40
0

Latin Wikipedia (la)

PR-score:
191st place
7,425
+169
AR-score:
147th place
12,624
0
F-score:
110th place
48
0

Norwegian (Nynorsk) Wikipedia (nn)

PR-score:
256th place
6,929
-2,401
AR-score:
390th place
7,057
+217
F-score:
297th place
65
0

Central Bicolano Wikipedia (bcl)

PR-score:
51st place
6,710
+3,554
AR-score:
90th place
1,806
+791
F-score:
115th place
42
+19

Sinhalese Wikipedia (si)

PR-score:
163rd place
6,282
+4,490
AR-score:
823rd place
356
0
F-score:
476th place
10
0

Tagalog Wikipedia (tl)

PR-score:
365th place
5,874
-1,244
AR-score:
790th place
2,057
+11
F-score:
234th place
51
+8

Icelandic Wikipedia (is)

PR-score:
213th place
5,816
-2,354
AR-score:
625th place
1,535
0
F-score:
214th place
17
0

Scots Wikipedia (sco)

PR-score:
473rd place
5,129
+1,032
AR-score:
545th place
2,317
0
F-score:
428th place
27
0

Venetian Wikipedia (vec)

PR-score:
72nd place
3,983
-133
AR-score:
447th place
400
0
F-score:
530th place
1
0

Western Armenian Wikipedia (hyw)

PR-score:
98th place
3,685
-4,969
AR-score:
525th place
729
0
F-score:
196th place
20
0

Belarusian (Taraškievica) Wikipedia (be-x-old)

PR-score:
416th place
3,240
+193
AR-score:
320th place
5,549
+200
F-score:
374th place
27
+1

Aragonese Wikipedia (an)

PR-score:
183rd place
3,094
-2,326
AR-score:
141st place
5,154
0
F-score:
72nd place
32
0

Nepali Wikipedia (ne)

PR-score:
347th place
3,067
+1,062
AR-score:
540th place
1,302
+133
F-score:
385th place
15
+4

Assamese Wikipedia (as)

PR-score:
273rd place
2,402
-397
AR-score:
234th place
1,422
+163
F-score:
250th place
20
0

Haitian Wikipedia (ht)

PR-score:
68th place
2,279
-799
AR-score:
14th place
5,764
0
F-score:
23rd place
39
0

Gorontalo Wikipedia (gor)

PR-score:
51st place
1,895
-4,871
AR-score:
11th place
1,211
+2
F-score:
20th place
9
0

Luxembourgish Wikipedia (lb)

PR-score:
356th place
1,734
+1,518
AR-score:
681st place
1,484
+118
F-score:
445th place
6
+1

Belarusian Wikipedia (be)

PR-score:
1,411th place
1,652
-283
AR-score:
1,448th place
1,819
0
F-score:
751st place
32
0

Santali Wikipedia (sat)

PR-score:
144th place
1,643
-681
AR-score:
275th place
217
+11
F-score:
190th place
9
+1

Bavarian Wikipedia (bar)

PR-score:
455th place
1,616
+150
AR-score:
1,992nd place
149
0
F-score:
536th place
3
0

Ladino Wikipedia (lad)

PR-score:
129th place
1,571
-243
AR-score:
191st place
800
0
F-score:
438th place
1
0

Balinese Wikipedia (ban)

PR-score:
116th place
1,511
-307
AR-score:
89th place
576
+100
F-score:
48th place
8
+1

Sorani Wikipedia (ckb)

PR-score:
553rd place
1,460
+452
AR-score:
415th place
1,260
+93
F-score:
232nd place
14
+1

Maithili Wikipedia (mai)

PR-score:
287th place
1,435
-3,214
AR-score:
224th place
425
0
F-score:
232nd place
8
0

Kannada Wikipedia (kn)

PR-score:
927th place
1,285
-1,272
AR-score:
742nd place
1,295
0
F-score:
438th place
28
0

Ido Wikipedia (io)

PR-score:
416th place
1,280
-1,539
AR-score:
348th place
1,978
0
F-score:
341st place
3
0

Western Punjabi Wikipedia (pnb)

PR-score:
287th place
1,243
-156
AR-score:
279th place
841
+26
F-score:
93rd place
66
+16

Occitan Wikipedia (oc)

PR-score:
454th place
1,172
-697
AR-score:
1,111th place
739
0
F-score:
152nd place
25
0

Sindhi Wikipedia (sd)

PR-score:
271st place
1,114
-259
AR-score:
146th place
882
+3
F-score:
81st place
21
0

Somali Wikipedia (so)

PR-score:
339th place
1,099
+539
AR-score:
273rd place
640
+600
F-score:
350th place
3
+1

South Azerbaijani Wikipedia (azb)

PR-score:
885th place
1,058
+372
AR-score:
1,026th place
600
0
F-score:
565th place
15
0

Bashkir Wikipedia (ba)

PR-score:
974th place
968
-936
AR-score:
831st place
714
0
F-score:
344th place
26
0

Interlingua Wikipedia (ia)

PR-score:
292nd place
907
-30
AR-score:
235th place
973
0
F-score:
36th place
18
0

Classical Chinese Wikipedia (zh-classical)

PR-score:
163rd place
900
+900
AR-score:
408th place
100
+100
F-score:
804th place
1
+1

West Frisian Wikipedia (fy)

PR-score:
413th place
850
-550
AR-score:
81st place
4,800
0
F-score:
255th place
5
0

Yoruba Wikipedia (yo)

PR-score:
527th place
833
-1,000
AR-score:
77th place
4,133
0
F-score:
166th place
9
0

Burmese Wikipedia (my)

PR-score:
1,383rd place
630
+299
AR-score:
1,659th place
263
+13
F-score:
795th place
6
+1

Scottish Gaelic Wikipedia (gd)

PR-score:
695th place
587
-104
AR-score:
399th place
1,512
0
F-score:
267th place
7
0

Acehnese Wikipedia (ace)

PR-score:
192nd place
500
+400
AR-score:
242nd place
200
0
F-score:
382nd place
1
0

Erzya Wikipedia (myv)

PR-score:
294th place
401
-576
AR-score:
378th place
104
0
F-score:
143rd place
5
0

Avar Wikipedia (av)

PR-score:
318th place
392
-88
AR-score:
598th place
10
0
F-score:
60th place
6
0

Faroese Wikipedia (fo)

PR-score:
980th place
386
+87
AR-score:
1,454th place
141
0
F-score:
298th place
6
0

Bhojpuri Wikipedia (bh)

PR-score:
1,118th place
380
+105
AR-score:
1,579th place
41
+29
F-score:
910th place
2
+1

Oriya Wikipedia (or)

PR-score:
1,158th place
351
-490
AR-score:
833rd place
451
-50
F-score:
319th place
17
-1

Chuvash Wikipedia (cv)

PR-score:
706th place
334
-102
AR-score:
260th place
1,400
0
F-score:
240th place
6
0

Yiddish Wikipedia (yi)

PR-score:
587th place
277
-39
AR-score:
649th place
177
-28
F-score:
247th place
2
0

Breton Wikipedia (br)

PR-score:
1,211th place
275
-350
AR-score:
615th place
1,316
0
F-score:
442nd place
5
0

Maltese Wikipedia (mt)

PR-score:
701st place
229
-135
AR-score:
743rd place
178
0
F-score:
362nd place
3
0

Zulu Wikipedia (zu)

PR-score:
224th place
222
-241
AR-score:
274th place
68
0
F-score:
206th place
2
0

Low Saxon Wikipedia (nds)

PR-score:
1,764th place
219
-238
AR-score:
2,071st place
149
0
F-score:
969th place
3
0

Uzbek Wikipedia (uz)

PR-score:
2,424th place
217
-105
AR-score:
3,382nd place
66
0
F-score:
1,323rd place
3
0

Alemannic Wikipedia (als)

PR-score:
2,546th place
187
+6
AR-score:
2,936th place
141
0
F-score:
627th place
4
0

Tatar Wikipedia (tt)

PR-score:
2,705th place
173
-24
AR-score:
2,133rd place
285
0
F-score:
304th place
14
0

Picard Wikipedia (pcd)

PR-score:
299th place
168
-388
AR-score:
612th place
9
0
F-score:
143rd place
2
0

Wu Wikipedia (wuu)

PR-score:
622nd place
166
+133
AR-score:
746th place
66
0
F-score:
1,331st place
1
0

Tulu Wikipedia (tcy)

PR-score:
404th place
150
-500
AR-score:
577th place
100
0
F-score:
710th place
1
0

Hausa Wikipedia (ha)

PR-score:
479th place
142
-279
AR-score:
368th place
71
0
F-score:
358th place
3
0

Goan Konkani Wikipedia (gom)

PR-score:
124th place
133
-133
AR-score:
71st place
366
0
F-score:
139th place
2
0

Khmer Wikipedia (km)

PR-score:
1,220th place
122
-83
AR-score:
1,225th place
31
0
F-score:
235th place
5
0

Tajik Wikipedia (tg)

PR-score:
1,396th place
111
-250
AR-score:
1,047th place
127
0
F-score:
708th place
2
0

Tuvan Wikipedia (tyv)

PR-score:
571st place
83
-58
AR-score:
805th place
22
+5
F-score:
208th place
3
0

Kapampangan Wikipedia (pam)

PR-score:
1,049th place
75
-1
AR-score:
496th place
375
0
F-score:
315th place
4
0

Kazakh Wikipedia (kk)

PR-score:
5,682nd place
68
+4
AR-score:
6,161st place
46
0
F-score:
3,948th place
1
0

Palatinate German Wikipedia (pfl)

PR-score:
338th place
66
0
AR-score:
351st place
33
0
F-score:
347th place
1
0

Gilaki Wikipedia (glk)

PR-score:
258th place
63
-27
AR-score:
281st place
18
0
F-score:
268th place
1
0

Quechua Wikipedia (qu)

PR-score:
726th place
58
-250
AR-score:
715th place
83
0
F-score:
359th place
2
0

Igbo Wikipedia (ig)

PR-score:
460th place
53
-40
AR-score:
403rd place
26
0
F-score:
211th place
2
0

Mirandese Wikipedia (mwl)

PR-score:
1,217th place
50
0
AR-score:
1,085th place
50
0
F-score:
690th place
2
0

Kabyle Wikipedia (kab)

PR-score:
347th place
50
0
AR-score:
203rd place
50
0
F-score:
354th place
1
0

Chechen Wikipedia (ce)

PR-score:
2,171st place
35
-27
AR-score:
2,492nd place
15
0
F-score:
1,906th place
1
0

Sanskrit Wikipedia (sa)

PR-score:
706th place
34
-71
AR-score:
529th place
133
0
F-score:
219th place
3
0

Lombard Wikipedia (lmo)

PR-score:
1,282nd place
25
-50
AR-score:
390th place
375
0
F-score:
834th place
1
0

Turkmen Wikipedia (tk)

PR-score:
642nd place
16
-17
AR-score:
335th place
41
0
F-score:
314th place
1
0

Piedmontese Wikipedia (pms)

PR-score:
205th place
12
-100
AR-score:
162nd place
50
0
F-score:
147th place
1
0

Lao Wikipedia (lo)

PR-score:
767th place
9
0
AR-score:
857th place
1
0
F-score:
240th place
2
0

Kashubian Wikipedia (csb)

PR-score:
175th place
7
-62
AR-score:
107th place
161
0
F-score:
104th place
1
0

Newar Wikipedia (new)

PR-score:
1,125th place
5
0
AR-score:
1,134th place
5
0
F-score:
356th place
2
0

Papiamentu Wikipedia (pap)

PR-score:
338th place
4
-5
AR-score:
331st place
4
0
F-score:
231st place
1
0

Nahuatl Wikipedia (nah)

PR-score:
236th place
4
0
AR-score:
212th place
32
0
F-score:
188th place
1
0

Popularity and reliability assessment of sources in references of Wikipedia in different languages. Data extraction based on complex method using Wikimedia dumps in July 2020. To find the most popular and reliable sources we used information about over 200 million references of Wikipedia articles. More details in the research "Modeling Popularity and Reliability of Sources in Multilingual Wikipedia". Values for PR-score and AR-score were additinaly increased 100 times (to distinguish smaller values in the ranking).