MATISOVS, Ivars. ZĪDAIŅU MIRSTĪBA KĀ VIDES KVALITĀTES INDIKATORS LATGALĒ. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 103–109, 1999. DOI: 10.17770/etr1999vol1.1896. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/1896.. Acesso em: 4 may. 2024.