ILSTERS, Andrievs. RESEARCHES OF ENVIROMEMT-FRIENDLY TECHNOLOGIES AND MANUFACTURER’S COSTS IN PIG FARMING. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 29–35, 2001. DOI: 10.17770/etr2001vol1.1930. Disponível em: https://journals23.rta.lv/index.php/ETR/article/view/1930.. Acesso em: 3 dec. 2024.