“Innovation in the Service Sector: A Possible Recipe for Success for the Spa Towns of Central Europe”. ENTRENOVA - ENTerprise REsearch InNOVAtion Journal 6, no. 1 (September 22, 2020): 504–511. Accessed October 6, 2025. https://ojs.srce.hr/index.php/entrenova/article/view/13502.