“…Cluster 3 -Business and Tourism Development Models, Sustainability and Promotion Strategies (Alen et al, 2014;Alina-Cerasela, 2015;Beriatos and Papageorgiou, 2009;Chrobak et al, 2020;Noviello and Smetkiewicz, 2019;Szromek, 2020;Szromek and Naramski, 2019;Szromek and Wybranczyk, 2019;Walton, 2014;Zunic et al, 2019) While Szromek and Naramski (2019) examine business management models for tourism treatment activities carried out in spas, emphasizing its uniqueness, for example, in terms of the raw materials available to the establishment (thermal waters). Alen et al (2014) propose an efficient business model with differentiated services as a strategy for survival.…”