Willberg M, Gruber T, Vergos GS (2017) Analysis of GOCE Omission Error and its Contribution to Vertical Datum Offsets in Greece and its Islands. In: 1st Joint Commission 2 and IGFS Meeting (Gravity, Geoid and Height System 2016 - GGHS2016), International Association of Geodesy Symposia Vol. 146, Springer International Publishing Switzerland