Sardaryan, A.S., M.A. Grigoryan, V.P. Vardanyan, and M.S. Mkrtchyan. “FEATURES RADIATION FIELD IN NATURAL AND ARTIFICIAL UNDERGROUND CAVITIES: (according to Observations in Мozrov and Аrji Caves)”. Proceedings of the YSU C: Geological and Geographical Sciences 53, no. 3 (250) (December 16, 2019): 161–165. Accessed May 12, 2024. https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol53_no3_2019_pp161-165.