ROSKA, A.; JAUNZEME, A. VIENOTAS VIDES AIZSARDZĪBAS VADĪBAS SISTĒMAS IZVEIDE. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 166–170, 1999. DOI: 10.17770/etr1999vol1.1881. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/1881.. Acesso em: 6 may. 2024.