Alison Cawsey Euan W. Dempster Daniel Pacey M. Howard Williams David H. Marwick Lachlan M. MacKinnon Constraining XML Transformations for Personalised Information Presentation. 136-143 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3112&spage=136 2004 conf/bncod/2004 BNCOD db/conf/bncod/bncod2004.html#CawseyDPWMM04