Tverda Oksana . Scientific and theoretical bases of environmental safety of mineral complexes for the production of gravel of the Western region of Ukraine : Доктор технічних наук : spec.. 21.06.01 - Екологічна безпека : presented. 2018-12-27; popup.evolution: .; Sumy State University. – Суми, 0518U002776.

Updated: 2026-11-09