Zofia Baldysz. COMPARATIVE ANALYSIS OF ZTD OBTAINED FROM DIFFERENTIAL AND ABSOLUTE APPROACH, BASED ON LONG TIME SERIES. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Informatics, Geoinformatics and Remote Sensing, 2016. https://doi.org/10.5593/sgem2016/b22/s09.018