Uwe Naumann Peter Gottschling Simulated Annealing for Optimal Pivot Selection in Jacobian Accumulation. 83-97 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2827&spage=83 2003 conf/saga/2003 SAGA db/conf/saga/saga2003.html#NaumannG03