Посилання:On Markov graphs / S. Kozerenko // Algebra and Discrete Mathematics. — 2013. — Vol. 16, № 1. — С. 96–102. — Бібліогр.: 8 назв. — англ.
Підтримка:The author would like to thank M. Plakhotnyk for his outstanding support during the work on this paper, V. V. Kirichenko for many helpful suggestions and V. V. Fedorenko for a general discussions on this topic.