Sardaryan, A.S., and M.S. Mkrtchyan. “CHANGES IN THE ELASTIC PROPERTIES AND IN THE GRAVITATIONAL FIELD OF ROCKS DUE TO STRONG EARTHQUAKES AND VOLCANOES”. Proceedings of the YSU C: Geological and Geographical Sciences 54, no. 3 (253) (December 25, 2020): 162–166. Accessed May 19, 2024. https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol54_no3_2020_pp162-166.