@unpublished{TUW-165418, author = {Valenta, Gerhard and Loibnegger, Friedrich}, title = {Investigations of Fractures of Rails at Vienna Underground and Measures to reduce them}, year = {2007}, note = {talk: Wieghardt {\&} George R. Irwin Centenary Conference (WICC); March 1-2, 2007 (ICF - Interquadrennial Conference on Structural Integrity in the Service of Public Safety), Wien; 2007-03-01 -- 2007-03-02} }