@unpublished{TUW-120924, author = {Englich, Sigrid and Weber, Robert and Schuh, Harald}, title = {Empirical validation of the cenventional model for length of day variations due to zonal tides}, year = {2007}, note = {talk: Journ{\`e}es ''Syst{\`e}ms de r{\'e}f{\'e}rence spatio-temporel'', Paris, Frankreich; 2007-09-17 -- 2007-09-19} }