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International Journal of Applied Mathematics and Computer Science > 2006 > 16 > 3 > 387-397
International Journal of Applied Mathematics and Computer Science > 2005 > 15 > 3 > 405-420
International Journal of Applied Mathematics and Computer Science > 2006 > 16 > 3 > 387-397
International Journal of Applied Mathematics and Computer Science > 2005 > 15 > 3 > 405-420