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Computers and Mathematics with Applications > 1996 > 31 > 11 > 105-114
Journal of Computational and Applied Mathematics > 1995 > 63 > 1-3 > 349-355
Computers and Mathematics with Applications > 1996 > 31 > 11 > 105-114
Journal of Computational and Applied Mathematics > 1995 > 63 > 1-3 > 349-355