КУПЕШОВА, С.; ЖАНАЛИНОВ, А. Analysis of effectiveness; use programs. Journal of Economic Research & Business Administration, [S. l.], v. 90, n. 2, p. 143–147, 2015. Disponível em: https://be.kaznu.kz/index.php/math/article/view/645. Acesso em: 24 nov. 2024.