Mkrtchyan, H. H., E. V. Abazyan, and A. A. Avetisyan. “AUTHENTICITY DEGREE OF CORE FACTS”. Proceedings of the YSU C: Geological and Geographical Sciences 42, no. 3 (217) (October 6, 2008): 148–152. Accessed July 22, 2024. https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol42_no3_2008_pp148-152.