Adlane Habed Boubakeur Boufama Self-Calibration of a Simplified Camera Using Kruppa Equations. 446-450 2004 conf/crv/2004 CRV http://doi.ieeecomputersociety.org/10.1109/CCCRV.2004.1301481 db/conf/crv/crv2004.html#HabedB04