Gerald G. Owenson Martyn Amos David Hodgson Alan Gibbons 102-105 2001 5 Soft Comput. 2 http://www.springerlink.com/openurl.asp?genre=article&issn=1432-7643&volume=5&issue=2&spage=102 db/journals/soco/soco5.html#OwensonAHG01