Olsen, S.O. <br/><br/>
Investigation of prestressed reinforced concrete for highwa-y bridges part 4: strength in shear of beams with web reinf-orcement / by S.O. Olesen, M.A. Sozen, C.P. Siess 

 - Urbana, Illinois : University of Illinois, College of Engineering 
 - 116 p. 
 - Engineering Experiment Station Bulletin ; 493 .