“METHOD OF CALCULATION OF EVAPOTRANSPIRATION AND REGULARITIES OF SPATIO-TEMPORAL CHANGES IN LAKE SEVAN BASIN”. Proceedings of the YSU C: Geological and Geographical Sciences, vol. 43, no. 1 (218), Apr. 2009, pp. 30-37, https://doi.org/10.46991/PYSU:C/2009.43.1.030.