Tibério S. Caetano Terry Caelli Dante Augusto Couto Barone A Comparison of Junction Tree and Relaxation Algorithms for Point Matching using Different Distance Metrics. 124-127 2004 ICPR (2) http://csdl.computer.org/comp/proceedings/icpr/2004/2128/02/212820124abs.htm db/conf/icpr/icpr2004-2.html#CaetanoCB04