Gasparyan, V.M., S.V. Grigoryan, M.E. Kirakosyan, and L.V. Harutyunyan. 2013. “ECOLOGICAL SIGNIFICANCE OF LITHOGEOCHEMICAL EXPLORATION METHODS FOR ORE DEPOSITS”. Proceedings of the YSU C: Geological and Geographical Sciences 47 (1 (230). Yerevan, Armenia:3-9. https://doi.org/10.46991/PYSU:C/2013.47.1.003.