OSIS, Māris. VAI VIDES SPECIĀLISTI SPĒJ NODROŠINĀT VIDES AIZSARDZĪBU?. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 135–135, 1999. DOI: 10.17770/etr1999vol1.1890. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/1890.. Acesso em: 27 apr. 2024.