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International Journal of Applied Mathematics and Computer Science > 2009 > 19 > 1 > 127-141
International Journal of Applied Mathematics and Computer Science > 2008 > 18 > 4 > 539-551
International Journal of Applied Mathematics and Computer Science > 2009 > 19 > 1 > 127-141
International Journal of Applied Mathematics and Computer Science > 2008 > 18 > 4 > 539-551