Popov, E.P. <br/><br/>
Structural steel bracing systems: behavior under cyclic loa-ding / E. P. Popov, K. Takanashi, C.W. Roeder. 

 - Berkeley, Calif. : University of California, College of Engineering 
 - 73 p. 
 - Report ; No. UCB / EERC 76-17. .