Eduardo Bayro-Corrochano Clifford Geometric Algebra: A Promising Framework for Computer Vision, Robotics and Learning. 25-36 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3287&spage=25 2004 conf/ciarp/2004 CIARP db/conf/ciarp/ciarp2004.html#Bayro-Corrochano04