MATISĀNS, Eduards; IVANOVS, Semjons. ENVIROMENT-FRIENDLY FARMING PROJECTS IN LATGALE. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 75–80, 2001. DOI: 10.17770/etr2001vol1.1939. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/1939.. Acesso em: 5 may. 2024.