“SOLUTION OF PALEO-HYDROGEOLOGICAL PROBLEMS BY ELECTRICAL VES METHOD: (case Study the Lake Sevan Catchment Basin)”. Proceedings of the YSU C: Geological and Geographical Sciences, vol. 52, no. 1 (245), Apr. 2018, pp. 3-7, https://doi.org/10.46991/PYSU:C/2018.52.1.003.