Potosyan, V.A. 2017. “REGIONAL DIFFERENCES AND PROBLEMS OF THE SEX AND AGE STRUCTURE OF THE POPULATION OF RA”. Proceedings of the YSU C: Geological and Geographical Sciences 51 (1 (242). Yerevan, Armenia:55-61. https://doi.org/10.46991/PYSU:C/2017.51.1․055.