Gavaza, T., Lebedeva, S., Perkova, N., & Fakhretdinova, V. (2019). MATHEMATICAL TASKS AS A MEANS OF FORMING PROFESSIONAL COMPETENCIES OF FUTURE TEACHERS. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, 1, 172-182. https://doi.org/10.17770/sie2019vol1.3872