Wendt, Jan Andrzej, and Tomasz Wiskulski. “Changes in Sea Cruise Tourism in Gdynia”. Studies of the Industrial Geography Commission of the Polish Geographical Society 32, no. 1 (March 25, 2018): 76–84. Accessed June 23, 2024. https://prace-kgp.uken.krakow.pl/article/view/20801653.321.6.