Achoyan, Zh. A., V. Zh. Achoyan, and O. A. Avetisyan. “ON SOME QUESTIONS FOR HORIZONTAL DRAIN CALCULATION”. Proceedings of the YSU C: Geological and Geographical Sciences 40, no. 2 (210) (May 30, 2006): 136–138. Accessed November 22, 2024. https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol40_no2_2006_pp136-138.