Bache, Hans Henrik. <br/><br/>
Modal determination of concrete resistance to popout format-ion / Hans Henrik Bache , Jens Christian Isen. 

 - New York : American Concrete Institute 
 - [8] p. 
 - Beton for Knings Laboratoriet-saertryk , hr. 44 .
<br/><br/> "Authorized reprint from copyrighted Journal of the America-n Concrete Institute".