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Journal of Computational and Applied Mathematics > 2006 > 197 > 1 > 169-187
Journal of Mathematical Analysis and Applications > 2001 > 262 > 2 > 499-528
Journal of Computational and Applied Mathematics > 2006 > 197 > 1 > 169-187
Journal of Mathematical Analysis and Applications > 2001 > 262 > 2 > 499-528