NOVIKS, Gotfrīds. BASIS OF OPTIMAL MINERAL INORGANIC WASTE PROCESSING METHODS. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 87–101, 2007. DOI: 10.17770/etr2007vol1.1736. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/1736.. Acesso em: 12 may. 2025.