Долгое, Олег. “LOGICAL TASKS AS A FACTOR FOR THE DEVELOPMENT OF LOGICAL-MATHEMATICAL SKILLS OF JUNIOR PUPILS”. Modern engineering and innovative technologies 3, no. 10-03 (December 31, 2019): 73–78. Accessed April 26, 2024. https://www.moderntechno.de/index.php/meit/article/view/meit10-03-046.