V. Robins Jennifer Abernethy N. Rooney Elizabeth Bradley Topology and intelligent data analysis. 505-515 2004 8 Intell. Data Anal. 5 http://iospress.metapress.com/openurl.asp?genre=article&issn=1088-467X&volume=8&issue=5&spage=505 db/journals/ida/ida8.html#RobinsARB04