ALTMANN, G.; ALEKSANYAN, G.P. SUSTAINABILITY IN TOURISM: PROBLEMS AND SOME BASIC DIRECTIONS OF SUSTAINABLE TOURISM MANAGEMENT. Proceedings of the YSU C: Geological and Geographical Sciences, Yerevan, Armenia, v. 50, n. 2 (240), p. 59–67, 2016. DOI: 10.46991/PYSU:C/2016.50.2.059. Disponível em: https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol50_no2_2016_pp059-067. Acesso em: 21 may. 2024.