Kayirken Т. 2020. Union of naymans and merkits in the 13th century. Bulletin of L.N. Gumilyov Eurasian National University. Historical Sciences. Philosophy. Religious Studies Series. . 130, 1 (Mar. 2020), 35–49. DOI:https://doi.org/10.32523/2616-7255-2020-130-1-35-49.