Mazurek-Kusiak, A. K., and B. Sawicki. “Assessment of Economic Functions and Tourist Attractions of ‘Korzeniowy Dół’ in Kazimierz Dolny in the Light of Sustainable Development”. Economics and Environment, vol. 66, no. 3, June 2018, p. 11, https://ekonomiaisrodowisko.pl/journal/article/view/147.