Tamaryan, Grigor. “Economic Approaches to the Technological Processes of the Plasma Work With Metals”. Bulletin of Yerevan University G: Economics 4, no. 3 (December 28, 2013): 53–60. Accessed November 22, 2024. https://journals.ysu.am/index.php/bulletin-ysu-economics/article/view/vol_4_no_3_2013_pp053-060.