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Journal of Inequalities and Applications > 2019 > 2019 > 1 > 1-17
Boundary Value Problems > 2014 > 2014 > 1 > 1-14
Journal of Inequalities and Applications > 2019 > 2019 > 1 > 1-17
Boundary Value Problems > 2014 > 2014 > 1 > 1-14