Heinrich Voss A Jacobi-Davidson Method for Nonlinear Eigenproblems. 34-41 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3037&spage=34 2004 conf/iccS/2004-2 International Conference on Computational Science db/conf/iccS/iccS2004-2.html#Voss04