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Applied Mathematics and Computation > 2012 > 218 > 17 > 8702-8714
Bulletin of Mathematical Sciences > 2012 > 2 > 1 > 205-223
2008 Fourth International Conference on Natural Computation > 6 > 288 - 292
Journal of Computational and Applied Mathematics > 2000 > 118 > 1-2 > 337-351