Ela Claridge Stephen J. Preece An Inverse Method for the Recovery of Tissue Parameters from Colour Images. 306-317 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2732&spage=306 2003 conf/ipmi/2003 IPMI db/conf/ipmi/ipmi2003.html#ClaridgeP03