Hamzayev X. The purposes and the maintenance of modern mathematical formation of children of preschool age. ppmedu [Интернет]. 1 октябрь 2021 г. [цитируется по 11 октябрь 2025 г.];(1). доступно на: https://pshedu.jdpu.uz/index.php/ppmedu/article/view/2257