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Journal of Computational and Applied Mathematics > 2011 > 236 > 6 > 1333-1342
Applied Mathematics and Computation > 2009 > 209 > 2 > 259-265
Applied Mathematics and Computation > 2007 > 190 > 2 > 1723-1729
Applied Mathematics and Computation > 2007 > 186 > 2 > 1104-1112
Applied Mathematics and Computation > 2006 > 182 > 2 > 1093-1097