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International Journal of Applied Mathematics and Computer Science > 2013 > Vol. 23, no. 1 > 231--241
Foundations of Computing and Decision Sciences > 2009 > Vol. 34, No. 3 > 193-208
International Journal of Applied Mathematics and Computer Science > 2013 > Vol. 23, no. 1 > 231--241
Foundations of Computing and Decision Sciences > 2009 > Vol. 34, No. 3 > 193-208