Cezary Specht, Mariusz Specht, Pawel Dabrowski (2017). COMPARATIVE ANALYSIS OF ACTIVE GEODETIC NETWORKS IN POLAND. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Informatics, Geoinformatics and Remote Sensing, 163-176. https://doi.org/10.5593/sgem2017/22/s09.021