ЭКОНОМИЧЕСКАЯ ОЦЕНКА ТЕХНОЛОГИЙ ОЧИСТКИ ПРИРОДНОЙ ВОДЫ. Journal of Economic Research & Business Administration, [S. l.], v. 87, n. 5, p. 86–89, 2015. Disponível em: https://be.kaznu.kz/index.php/math/article/view/800. Acesso em: 19 jul. 2026.