Noviks, Gotfrīds. “ECO-INNOVATIVE SOLUTIONS FOR THE PROCESSING OF TECHNOGENIC MINERAL RESOURCES”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 20, 2019): 204–209. Accessed May 3, 2024. https://journals.rta.lv/index.php/ETR/article/view/4050.