Dziuba, Jarosław, and Elżbieta Życzkowska. “The Importance of Revenues from Spa Fee in Financing Municipalities in Poland”. Ekonomia i Prawo. Economics and Law 23, no. 3 (September 30, 2024): 459–476. Accessed July 1, 2025. https://apcz.umk.pl/EiP/article/view/42736.