METLĀNS, Aigars; TEIRUMNIEKS, Edmunds. EAST LATGALE SAA PROJECT. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 80–84, 2001. DOI: 10.17770/etr2001vol1.1940. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/1940.. Acesso em: 5 may. 2024.