YU, C.-E. Show your teeth and tilt your head! Customer preferences towards a service with a smile. European Journal of Tourism Research, [S. l.], v. 22, p. 31–44, 2019. DOI: 10.54055/ejtr.v22i.373. Disponível em: https://ejtr.vumk.eu/index.php/about/article/view/373. Acesso em: 24 oct. 2026.