Alzhanova, E.E., and A.S. Kasymbekov. “History of Colonization of the Kazakh Steppe in Written Sources of the 19th Century: Electronic Collection ”. Bulletin of the Karaganda University History. Philosophy Series, vol. 90, no. 2, June 2018, pp. 50-55, https://ejh.buketov.edu.kz/history-philosophy-vestnik/article/view/245.