M. T. Krajcarz, “Cave deposits in contemporary Polish sightseeing: social awareness of this issue”, in Turystyka i krajoznawstwo, vol. 11, M. Makowska-Iskierka and J. Wojciechowska, Eds. Poland: Lodz University Press, 2021, pp. 163–174. doi: 10.18778/8220-576-3.09.