Rafael M. Gasca Carmelo Del Valle Victor Cejudo I. Barba Improving the Computational Efficiency in Symmetrical Numeric Constraint Satisfaction Problems. 269-279 2005 conf/caepia/2005 CAEPIA http://dx.doi.org/10.1007/11881216_29 db/conf/caepia/caepia2005.html#GascaVCB05