Potosyan, V., & Potosyan, A. (2019). HISTORICAL-GEOGRAPHICAL ANALYSIS OF SETTLEMENT PATTERN FORMATION IN RA FRONTIER, MOUNTAINOUS AND HIGH MOUNTAINOUS AREAS. Proceedings of the YSU C: Geological and Geographical Sciences, 53(3 (250), 201–208. https://doi.org/10.46991/PYSU:C/2019.53.3.201