PIASECKI, Adam; DĘBCZYŃSKA, Klaudia. The underground city: the tourism potential of water and sewage infrastructure: the example of Poland. Bulletin of Geography. Socio-economic Series, [S. l.], n. 54, p. 89–95, 2021. DOI: 10.2478/bog-2021-0035. Disponível em: https://apcz.umk.pl/BGSS/article/view/36358. Acesso em: 25 dec. 2025.