Voir la notice de l'article provenant de la source Math-Net.Ru
[1] Borodin O. V., “Reshenie zadach Ringelya o vershinno-granevoi raskraske ploskikh grafov i o raskraske 1-planarnykh grafov”, Metody diskretnogo analiza v izuchenii realizatsii logicheskikh funktsii, Sb. nauch. tr. Vyp. 41, In-t matematiki SO AN SSSR, Novosibirsk, 1984, 12–26 | MR
[2] Borodin O. V., “Reshenie zadach Kotsiga i Gryunbauma ob otdelimosti tsikla v ploskikh grafakh”, Matem. zametki, 46:5 (1989), 9–12 | MR
[3] Borodin O. V., “A new proof of 6 color theorem”, J. Graph Theory, 19:4 (1995), 507–521 | DOI | MR | Zbl
[4] Fabrici I., Madaras T., “The structure of 1-planar graphs”, Discrete Math., 307:7–8 (2007), 854–865 | DOI | MR | Zbl
[5] Grünbaum B., “Polytopal graphs”, Studies in Graph Theory, Part II, Studies in Math., 12, Math. Assoc. Amer., Washington, DC, 1975, 201–204 | MR
[6] Kotzig A., “From the theory of Euler polyhedra”, Mat.-Fyz. Casopis, 13:1 (1963), 20–34 | MR
[7] Lebesgue H., “Quelques cosequences simple de la formule d'Euler”, J. Math. Pures Appl., 9 (1940), 27–43 | MR | Zbl
[8] Ringel G., “Ein Sechsfarbenproblem auf der Kugel”, Abh. Math. Sem. Univ. Hamburg, 29 (1965), 107–117 | DOI | MR | Zbl