DOĞAN, H.; GÜNEY, D.; GÖLLER, V. A Research for Tourist Perceptions and Satisfaction about the Douro Valley. Journal of Tourism & Gastronomy Studies, [S. l.], v. 4, n. 2, p. 137–153, 2022. Disponível em: https://jotags.net/index.php/jotags/article/view/165. Acesso em: 19 apr. 2026.