Achoyan, Z. A., Achoyan, V. Z. and Avetisyan, O. A. (2006) “ON SOME QUESTIONS FOR HORIZONTAL DRAIN CALCULATION”, Proceedings of the YSU C: Geological and Geographical Sciences. Yerevan, Armenia, 40(2 (210), pp. 136–138. doi: 10.46991/PYSU:C.2006.40.2.136.