Duisenbay U. Дүйсенбай Ұ.М. “Некоторые проблемы расчета статистических данных”. Рroblems of engineering and professional education 54, no. 3 (January 17, 2023): 37. Accessed January 7, 2026. https://bulprengpe.enu.kz/index.php/main/article/view/245.