Vagner-Sapukhina E. А., and D. V. Pezhemsky. “COMPARATIVE ANALYSIS OF THE TOTAL BODY SIZE OF THE MEDIEVAL BOLGAR POPULATION”. Arkheologiia Evraziiskikh Stepei (Archaeology of the Eurasian Steppes), no. 4, July 2018, pp. 326-39, https://www.evrazstep.ru/index.php/aes/article/view/374.