@unpublished{TUW-120928, author = {Wresnik, J{\"o}rg and B{\"o}hm, Johannes and Schuh, Harald}, title = {Vienna VLBI Simulations}, year = {2007}, note = {talk: IUGG 2007, Perugia, Italien; 2007-07-02 -- 2007-07-13} }