ANDRÁSSY, Erik, Andrej MOJZEŠ, Ema NOGOVÁ, and Ondrej ČANGEL. “Surface Identification of Undermined Spaces With the Use of Soil Radon Emanometry”. Contributions to Geophysics and Geodesy 51, no. 2 (June 29, 2021): 189-205. Accessed April 18, 2024. https://journal.geo.sav.sk/cgg/article/view/397.