Regional learning levels of Tourism business development (Innovative aspect). Economics and region, [S. l.], n. 4 (65), p. 33–39, 2017. DOI: 10.26906/EiR.2017.4 (65).889. Disponível em: https://ojs35.nupp.edu.ua/eir/article/view/889. Acesso em: 23 dec. 2025.