Kusainov, Amirlan A. <br/><br/>
Alternatives to standard mode superposition for analysis of- non-classically damped systems / by Amirlan A. Kusainov an-d Ray W. Clough 

 - Berkeley, Calif. : e Engineering Research Center 
 - 64 p. 
 - Report ; No. UCB / EERC 88-09 .
<br/><br/> "July 1988"