Shoshanov Saken Bakhytzhanovich, Makhanov Sagat Sultanbekovich, Salykova Leila Nurtleuovna, и Petr Hajek. «ORGANIZATION OF REFINED PRODUCTS SALES IN KAZAKHSTAN». Scientific Journal of Pedagogy and Economics, no. 1 (февраль 10, 2021): 194–201. просмотрено декабрь 5, 2025. https://journals.nauka-nanrk.kz/bulletin-science/article/view/383.