@unpublished{TUW-119926, author = {Mendes Cerveira, Pj. and Heinkelmann, Robert and B{\"o}hm, Johannes and Weber, Robert and Schuh, Harald}, title = {Surveying the International Terrestrial Reference Frame with GPS and VLBI}, year = {2005}, note = {talk: Graduate Student Meeting, Paris, France; 2005-03-21 -- 2005-03-25} }