ZIEMELIS, I.; ILJINS, U.; SAVCENKO, P.; ZEMĻANOJS, I.; IĻIČOVS, I. SIVĒNU APSTAROŠANA AR ULTRAVIOLETAJIEM STARIEM. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 247–255, 1999. DOI: 10.17770/etr1999vol1.1865. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/1865.. Acesso em: 23 nov. 2024.