Eugene Davydov Serafim Batzoglou A Computational Model for RNA Multiple Structural Alignment.. 254-269 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3109&spage=254 2004 conf/cpm/2004 CPM db/conf/cpm/cpm2004.html#DavydovB04