Proceedings 11th International FIG Symposium on Deformation Measurements Santorini (Thera) island, Greece, 25-28 May 2003 - Στείρος, Στάθης Κ.; Πυθαρούλη, Στυλιανή Ι. (Geodesy and Geodetic Applications Lab. Dept. of Civil Engineering, Patras University, 2003)