MATHEMATICAL TASKS AS A MEANS OF IMPROVING THE ECOLOGICAL CULTURE OF THE FUTURE TEACHERS. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 1, p. 97–102, 2017. DOI: 10.17770/etr2017vol1.2525. Disponível em: https://archive-journals.rtu.lv/etr/article/view/4202.. Acesso em: 11 mar. 2026.