@unpublished{TUW-121262, author = {Kudryashova, Maria and Snajdrova, Kristyna and Weber, Robert and Heinkelmann, Robert and Schuh, Harald}, title = {Combination of nutation time series derived from VLBI {\&} GNSS}, year = {2008}, note = {talk: IVS General Meeting, St. Petersburg; 2008-03-04} }