Khachatryan, Sh. V., R. G. Gevorgyan, and H. H. Sargsyan. “PHASE TRANSFORMATION OF ARMENIAN ZEOLITES DURING HYDROTHERMAL MODIFICATION”. Proceedings of the YSU C: Geological and Geographical Sciences 43, no. 1 (218) (April 20, 2009): 3–8. Accessed July 22, 2024. https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol43_no1_2009_pp003-008.