Lavrenov A, Pozdniakov S. Examples of Concepts Representations in the Main Content Lines of an Alternative Course of Mathematics in High School. Comput. Tools Educ. [Internet]. 2022 Dec. 28 [cited 2026 Oct. 30];(4):104-23. Available from: http://cte.eltech.ru/ojs/index.php/kio/article/view/1781