1. Earth Science Institute Slovak Academy of Sciences Banská Bystrica Slovak Republic
2. Department of Applied end Environmental Geophysics, Faculty of Natural Sciences Comenius University Bratislava Slovak Republic
3. Department of Theoretical Geodesy, Faculty of Civil Engineering Slovak University of Technology Bratislava Slovak Republic
4. GEODATA Group Hans‐Kudlich‐Straße 28 Leoben 8700 Austria
5. HBP Prievidza Inc. Nováky Slovak Republic