POTOSYAN, V.A. REGIONAL DIFFERENCES AND PROBLEMS OF THE SEX AND AGE STRUCTURE OF THE POPULATION OF RA. Proceedings of the YSU C: Geological and Geographical Sciences, Yerevan, Armenia, v. 51, n. 1 (242), p. 55–61, 2017. DOI: 10.46991/PYSU:C/2017.51.1․055. Disponível em: https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol51_no1_2017_pp055-061. Acesso em: 18 may. 2024.