KLAVINS, Maris. MODIFICATION OF HUMIC SUBSTANCES FOR DEVELOPMENT OF MATERIALS FOR ENVIRONMENTAL TECHNOLOGIES. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 101–104, 2019. DOI: 10.17770/etr2019vol1.4123. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/4123.. Acesso em: 28 apr. 2024.