Chilingaryan, L. A., et al. “WATER-RESOURCES CHARACTERISTICS OF LAKE SEVAN IN THE COURSE OF DEVELOPMENT OF THE PROBLEMS OF THE LAKE”. Proceedings of the YSU C: Geological and Geographical Sciences, vol. 40, no. 1 (209), Mar. 2006, pp. 134-41, doi:10.46991/PYSU:C.2006.40.1.134.