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Journal of Computational and Applied Mathematics > 2003 > 153 > 1-2 > 321-330
Physics Letters A > 1997 > 235 > 5 > 480-488
Journal of Computational and Applied Mathematics > 2003 > 153 > 1-2 > 321-330
Physics Letters A > 1997 > 235 > 5 > 480-488