Dietmar Jannach Klaus Leopold Hermann Hellwagner An Extensible Framework for Knowledge-Based Multimedia Adaptation. 144-153 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3029&spage=144 2004 conf/ieaaie/2004 IEA/AIE db/conf/ieaaie/ieaaie2004.html#JannachLH04