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Open Mathematics > 2015 > 13 > 1
International Journal of Applied Mathematics and Computer Science > 2013 > 23 > 4 > 809-821
International Journal of Applied Mathematics and Computer Science > 2013 > 23 > 4 > 809-821
Open Mathematics > 2015 > 13 > 1
International Journal of Applied Mathematics and Computer Science > 2013 > 23 > 4 > 809-821
International Journal of Applied Mathematics and Computer Science > 2013 > 23 > 4 > 809-821