David R. Powell Lloyd Allison Trevor I. Dix Modelling-Alignment for Non-random Sequences. 203-214 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3339&spage=203 2004 conf/ausai/2004 Australian Conference on Artificial Intelligence db/conf/ausai/ausai2004.html#PowellAD04