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International Journal of Applied Mathematics and Computer Science > 2011 > 21 > 1 > 97-107
International Journal of Applied Mathematics and Computer Science > 2003 > 13 > 3 > 317-325
International Journal of Applied Mathematics and Computer Science > 2011 > 21 > 1 > 97-107
International Journal of Applied Mathematics and Computer Science > 2003 > 13 > 3 > 317-325