KUPENOVA, Z. K.; KISHIBAYEVA, B. S.; ZHUNISOVA, G. E. Introduction to the theory of statistics. Введение в теорию стaтистики. Journal of Economic Research & Business Administration, [S. l.], v. 115, n. 3/2, 2016. Disponível em: https://be.kaznu.kz/index.php/math/article/view/1466. Acesso em: 21 nov. 2024.