VELIKOVA, E. . STRATEGIES FOR THE EXTENSION OF THE WINTER SEASON AT MOUNTAIN RESORTS IN BULGARIA. Proceedings of CBU in Economics and Business, [S. l.], v. 1, p. 154-161, 2020. DOI: 10.12955/peb.v1.33. Disponível em: https://ojs.cbuic.cz/index.php/peb/article/view/33. Acesso em: 5 may. 2026.