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Positive Solutions for a System of Hadamard-Type Fractional Differential Equations with Semipositone Nonlinearities by Youzheng Ding, Jiqiang Jiang, Donal O’Regan, Jiafa Xu

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Positive Solutions for a System of Semipositone Fractional Difference Boundary Value Problems by Cheng Chen, Jiafa Xu, Donal O’Regan, Zhengqing Fu

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A Generalized Strong Convergence Algorithm in the Presence of Errors for Variational Inequality Problems in Hilbert Spaces by Mostafa Ghadampour, Donal O’Regan, Ebrahim Soori, Ravi P. Agarwal

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Recent Trends in Boundary Value Problems 2014 by Bashir Ahmad, Juan J. Nieto, Donal O’Regan, Agacik Zafer

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A New Gap Function for Vector Variational Inequalities with an Application by Hui-qiang Ma, Nan-jing Huang, Meng Wu, Donal O'Regan

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