Sardaryan, A.S., and M.S. Mkrtchyan. 2020. “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 (3 (253). Yerevan, Armenia:162-66. https://doi.org/10.46991/PYSU:C/2020.54.3.162.