1. Abekova Zh.A., Oralbaev A.B., Berdaliyeva M., Izbasarova Zh.K., International Journal of Experimental Education, 2(2), 215–218 (2016). Accessed on: December 20, 2020. [Online]. Available: http://www.expeducation.ru/ru/article/view?id=9559
2. Askarova M.A., Molodoy uchenyy, 20.1(79.1), 34–36 (2014). Accessed on: December 20, 2020. [Online]. Available: https://moluch.ru/archive/79/14071/
3. Zhuravleva L.A., Kovtyukh I.V., Pyshnograyev S.V., Shkolnaya pedagogika, 2(5), 3–6 (2016). Accessed on: December 20, 2020. [Online]. Available: https://moluch.ru/th/2/archive/27/854/
4. Kovel M.I., Glinkina G.V., Nauka i shkola, 5, 84–95 (2018)
5. Krasnoborova A.A., Obucheniye, testirovaniye i otsenka, 10, 73–77 (2010)