@unpublished{TUW-119287, author = {Schuh, Harald}, title = {Untersuchung ionosph{\"a}rischer und troposph{\"a}rischer Parameter mittels VLBI and GPS}, year = {2002}, note = {invited; talk: PANGEO, Erdwissenschaften in {\"O}sterreich, Salzburg; 2002-06-28} }