Potosyan, V.A., and A.R. Avagyan. “THE CONCEPTS OF GEOGRAPHICAL STUDIES OF RA FRONTIER, MOUNTAINOUS AND HIGH MOUNTAINOUS AREAS SETTLEMENT PATTERN”. Proceedings of the YSU C: Geological and Geographical Sciences, vol. 52, no. 3 (247), Dec. 2018, pp. 206-14, doi:10.46991/PYSU:C/2018.52.3.206.