Празно множество (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Празно множество" in Bulgarian language version.

refsWebsite

Global rank Bulgarian rank

549^th place

322^nd place

6^th place

11^th place

311^th place

881^st place

archive.org (Global: 6^th place; Bulgarian: 11^th place)

Rudin, Walter. Principles of Mathematical Analysis. New York, McGraw-Hill, 1976. ISBN 007054235X. с. 300.

tripod.com (Global: 549^th place; Bulgarian: 322^nd place)

jeff560.tripod.com

Earliest Uses of Symbols of Set Theory and Logic.

unicode.org (Global: 311^th place; Bulgarian: 881^st place)

Unicode Standard 5.2