SLABEJ, Martin, Michal GRINČ, Matúš KOVÁČ, Martin DECKÝ, and Stefan ŠEDIVÝ. 2015. “Non-Invasive Diagnostic Methods for Investigating the Quality of Žilina airport’s Runway”. Contributions to Geophysics and Geodesy 45 (3), 237-54. https://doi.org/10.1515/congeo-2015-0022.