Lasse Bergroth Harri Hakonen Juri Väisänen New Refinement Techniques for Longest Common Subsequence Algorithms. 287-303 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2857&spage=287 2003 conf/spire/2003 SPIRE db/conf/spire/spire2003.html#BergrothHV03