Maklasova, L. E. “THE DESIGN OF THE MONGOLIAN HEADDRESS ‘GU–GU’ IN THE YUAN DYNASTY”. Arkheologiia Evraziiskikh Stepei (Archaeology of the Eurasian Steppes), no. 4, July 2018, pp. 120-6, https://www.evrazstep.ru/index.php/aes/article/view/340.