Guzik, Halina, and Wojciech Strzelczyk. “Tourist Development As a Factor in the Economic Formation of Tourist Area Products”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 12(936), Dec. 2015, pp. 17-33, https://doi.org/10.15678/ZNUEK.2014.0936.1202.