c1 Refereed Journal Article, Carmine Sellitto signed VUIR pt.18/10/11. Not checked in Sherpa MA 10/11/2011.
Broken link fixed.  NEW: All articles of this journal, whether published in the past or future, are now licensed to you under a Creative Commons By-NC license and copyright to articles is returned and retained by their respective authors." -from journal homepage. New conditions, file made available, LL 18/5/2020