Nurmakhanov Б.; Bektibaeva Z.K. Б. З. On one method for determining the number and plan of natural experiments. Рroblems of engineering and professional education, [S. l.], v. 12, n. 2, p. 53–57, 2023. DOI: 10.32523/2220-685X-2012-12-2-53-57. Disponível em: https://bulprengpe.enu.kz/index.php/main/article/view/618. Acesso em: 12 may. 2024.