Paul Luff Hideaki Kuzuoka Christian Heath Jun Yamashita Keiichi Yamazaki 81-88 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3331&spage=81 2004 conf/pcm/2004-1 PCM (1) db/conf/pcm/pcm2004-1.html#LuffKHYY04