Karu, Veiko, Angela Notton, Julia Gulevitš, Ingo Valgma, and Tiit Rahe. 2015. “Improvement of Technologies for Mining Waste Management”. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August): 127-32. https://doi.org/10.17770/etr2013vol1.811.