Lukasz Bolikowski Anna Gambin New Metrics for Phylogenies. 199-216 2007 78 Fundam. Inform. 2 http://iospress.metapress.com/openurl.asp?genre=article&issn=0169-2968&volume=78&issue=2&spage=199 db/journals/fuin/fuin78.html#BolikowskiG07