Tadepalli, Padmanabha R.; Hoffman, Norman; Mo, Y. L. & Hsu, Thomas T. C. (Thomas Tseng Chuang), 1933-. Steel fiber replacement of mild steel in prestressed concrete beams, report, January 2011; (https://texashistory.unt.edu/ark:/67531/metapth326778/m1/1/: accessed August 14, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .