J. Mitrikova, T. D. Vargova. "SATISFACTION OF VISITORS WITH SERVICES PROVIDED IN SELECTED CAVES OF NATIONAL PARK SLOVAK KARST INCLUDED IN UNESCO LIST." 6th SWS International Scientific Conference on Social Sciences ISCSS 2019, 2019, pp. 267-274. https://doi.org/10.5593/SWS.ISCSS.2019.5/S15.033