Gavaza, Tatiana, Svetlana Lebedeva, and Natalia Perkova. “MATHEMATICAL TASKS AS A MEANS OF IMPROVING THE ECOLOGICAL CULTURE OF THE FUTURE TEACHERS”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 15, 2017): 97–102. Accessed November 21, 2024. https://journals23.rta.lv/index.php/ETR/article/view/2525.