KUPENOVA, Z. K.; ZHUNISOVA, G. E.; ZHYENBEKOVA, A. M. Mean values and indicators of variations in statistics. Journal of Economic Research & Business Administration, [S. l.], v. 109, n. 3, 2016. Disponível em: https://be.kaznu.kz/index.php/math/article/view/1067. Acesso em: 22 dec. 2024.