Ismailov С. С. ., and Kojirova С. Б. . “Issues of Formation of the Kazakh-Russian Border in the 1920s-1930s”. Bulletin of L.N. Gumilyov Eurasian National University. Historical Sciences. Philosophy. Religious Studies, vol. 141, no. 4, Dec. 2022, pp. 50-66, doi:10.32523/2616-7255-2022-141-4-50-66.