ZAĻOKSNIS, J. Environmental Information System of the Republic of Latvia. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 300–303, 2006. DOI: 10.17770/etr2003vol1.2024. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/2024.. Acesso em: 8 may. 2024.