Achoyan, Zh.A., and O.A. Avetisyan. “WATER PERMEABILITY OF AERATION ZONE GROUNDS OF ADJACENT TERRITORYS OF THE STATIONS «YERITASARDAKAN»–«ZORAVAR ANDRANIK» OF YEREVAN UNDERGROUND”. Proceedings of the YSU C: Geological and Geographical Sciences, vol. 47, no. 1 (230), Apr. 2013, pp. 25-30, doi:10.46991/PYSU:C/2013.47.1.025.