Kenneth Appel (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Kenneth Appel" in Catalan language version.

Last modified: 07:44:51, 20 September 2026 (UTC)

Ref.Un. Ref.Website

Global rank Catalan rank

22books.google.cat

516^th place

3^rd place

4^th place

6^th place

11uceciencia.edu.do

low place

low place

low place

low place

2^nd place

4^th place

books.google.cat (Global: 516^th place; Catalan: 3^rd place)

Chartrand i Zhang, 2020, p. 18. Chartrand, Gary; Zhang, Ping. Chromatic Graph Theory (en anglès). CRC Press, 2020. ISBN 978-1-138-34386-3.
Wilson, 2014, p. 142. Wilson, Robin. Four Colors Suffice (en anglès). Princeton University Press, 2014. ISBN 978-0-691-15822-3.

doi.org (Global: 2^nd place; Catalan: 4^th place)

dx.doi.org

Nabi, 2020, p. 854. Nabi, Fayaz Ibni Gh «A Historical overview of Four Color Problem» (en anglès). Turkish Journal of Computing and Mathematics Education, Vol. 11, Num. 3, 2020, p. 850-855. DOI: 10.17762/turcomat.v11i3.9090. ISSN: 1309-4653.

turcomat.org (Global: low place; Catalan: low place)

Nabi, 2020, p. 854. Nabi, Fayaz Ibni Gh «A Historical overview of Four Color Problem» (en anglès). Turkish Journal of Computing and Mathematics Education, Vol. 11, Num. 3, 2020, p. 850-855. DOI: 10.17762/turcomat.v11i3.9090. ISSN: 1309-4653.

uceciencia.edu.do (Global: low place; Catalan: low place)

Marc-Kelly, 2022, p. x. Marc-Kelly, Jean Philippe Jean «La teoría de grafos y su importancia» (en castellà). UCE Ciencia, Vol. 10, Num. 3, 2022. ISSN: 2306-3556.

worldcat.org (Global: 4^th place; Catalan: 6^th place)

Marc-Kelly, 2022, p. x. Marc-Kelly, Jean Philippe Jean «La teoría de grafos y su importancia» (en castellà). UCE Ciencia, Vol. 10, Num. 3, 2022. ISSN: 2306-3556.
Nabi, 2020, p. 854. Nabi, Fayaz Ibni Gh «A Historical overview of Four Color Problem» (en anglès). Turkish Journal of Computing and Mathematics Education, Vol. 11, Num. 3, 2020, p. 850-855. DOI: 10.17762/turcomat.v11i3.9090. ISSN: 1309-4653.