@inproceedings{TUW-219275, author = {Tornatore, Vincenza and Krasna, Hana and Triglione, Damiano}, title = {European sessions and datum definitions}, booktitle = {IVS 2012 General Meeting Proceedings}, year = {2012}, editor = {Behrend, Dirk and Baver, Karen}, pages = {271--275}, organization = {NASA/CP 2012-217504}, publisher = {International VLBI Service} }