@unpublished{TUW-120874, author = {Mendes Cerveira, Pj. and Kl{\"u}gel, Thomas and Schreiber, Ulrich and Velikoseltsev, H. and Meurers, Bruno and Schuh, Harald}, title = {VLBI, ring laser and gravity observations for high-frequency polar motion and universal time variations}, year = {2007}, note = {poster presentation: AGU (American Geophysical Union), Acapulco,Mexico; 2007-05-22 -- 2007-05-25} }