L. Martirosyan, R. Sargsyan, A. Grigoryan, and Q. Harutyunyan, “RECREATIONAL ASSESSMENT OF HYPSOMETRIC ZONES OF THE NORTHERN ARMENIA: (SHIRAK, LORI, TAVUSH)”, Proc. YSU C: Geol. Geogr. Sci., vol. 51, no. 3 (244), pp. 189–194, Dec. 2017.