Hilbert J. Kappen Wim Wiegerinck Novel iteration schemes for the Cluster Variation Method. 415-422 2001 conf/nips/2001 NIPS http://www-2.cs.cmu.edu/Groups/NIPS/NIPS2001/papers/psgz/LT23.ps.gz db/conf/nips/nips2001.html#KappenW01