Dovgij, Oleg, and Ihor Bai. “FORMATION OF PRIMARY MATHEMATICAL KNOWLEDGE IN CHILDREN AS A CONDITION FOR SUCCESSFUL EDUCATION IN THE NEW UKRAINIAN SCHOOL”. Mountain School of Ukrainian Carpaty, no. 27 (April 26, 2022): 147–150. Accessed February 26, 2025. https://personnel.pnu.edu.ua/index.php/msuc/article/view/8758.