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Journal of the Egyptian Mathematical Society > 2017 > 25 > 3 > 291-293
Computational Methods and Function Theory > 2013 > 13 > 4 > 613-634
Siberian Mathematical Journal > 2006 > 47 > 5 > 924-933
Journal of the Egyptian Mathematical Society > 2017 > 25 > 3 > 291-293
Computational Methods and Function Theory > 2013 > 13 > 4 > 613-634
Siberian Mathematical Journal > 2006 > 47 > 5 > 924-933