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Mathematical Methods in the Applied Sciences > 44 > 9 > 7433 - 7441
Journal of Inequalities and Applications > 2014 > 2014 > 1 > 1-2
Mathematical Methods in the Applied Sciences > 44 > 9 > 7433 - 7441
Journal of Inequalities and Applications > 2014 > 2014 > 1 > 1-2