Movsesyan, R.S., and H.H. Mkrtchyan. “SOME QUESTIONS OF GEOLOGICAL-ECONOMIC ESTIMATION OF HARD MINERAL DEPOSITS”. Proceedings of the YSU C: Geological and Geographical Sciences 49, no. 2 (237) (August 10, 2015): 16–21. Accessed November 13, 2024. https://pub.ysu.am/index.php/proceedings-geol-geogr/article/view/vol49_no2_2015_pp016-021.