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Applied Mathematics and Computation > 2007 > 191 > 1 > 234-238
Applied Mathematics and Computation > 2007 > 190 > 2 > 1730-1734
Applied Mathematics and Computation > 2007 > 191 > 1 > 234-238
Applied Mathematics and Computation > 2007 > 190 > 2 > 1730-1734