Suprunenko, Y., Gorbar, E., Sharapov, S. і Loktev, V. 2008. Effect of next-to-nearest neighbor hopping on electronic properties of graphene: Graphene and graphite multilayers. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР. 34, 10 (Вер 2008), 1033–1039. DOI:https://doi.org/10.1063/1.2981394.