A. R. Szromek, K. Herman. "SELECTED METHODS OF BUSINESS MODEL DESIGNING IN THE CONTEXT OF HISTORIC TRANSFORMATION OF HEALTH RESORT ENTERPRISES SECTOR BUSINESS MODEL IN POLAND." 5th International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM 2018, 2018, pp. 691-698. https://doi.org/10.5593/sgemsocial2018/1.4/S04.089