Gavaza, Tatiana, Svetlana Lebedeva, Natalya Perkova, and Victoriia Fakhretdinova. 2019. “MATHEMATICAL TASKS AS A MEANS OF FORMING PROFESSIONAL COMPETENCIES OF FUTURE TEACHERS”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 1 (May): 172-82. https://doi.org/10.17770/sie2019vol1.3872.