Akrivi VAGENA; Gerassimos MANOUSSAKIS. Group Analysis of Official Hotel Classification Systems: A Recent Study. Current Approaches in Science and Technology Research Vol. 4, [S. l.], p. 1–17, 2021. DOI: 10.9734/bpi/castr/v4/2173F. Disponível em: https://stm.bookpi.org/CASTR-V4/article/view/1035. Acesso em: 13 jun. 2026.