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Ravi P. Agarwal

Existence theory for single and multiple periodic and almost periodic solutions of nonlinear integral equations: R. P. Agarwal and D. O'Regan; Volume 4, No.1, pp. 2-15; Link
Eigenvalue characterization of a system of difference equations: R. P. Agarwal, D. O'Regan, and P. J. Y. Wong; Volume 7, No.1, pp. 3-47; Link PDF
Quaternion-valued dynamic equations and Henstock-Kurzweil delta-integrals on time scales: A survey: Guangzhou Qin, Chao Wang, and R. P. Agarwal; Volume 26, No.1, pp. 55-76; Link
Existence of local and global solutions of fractional order differential equations: M. Muslim, C. Conca, and R. P. Agarwal; Volume 14, No.1, pp. 76-84; Link PDF
Applications of perturbations on accretive mappings to nonlinear elliptic systems involving $(p,q)$ -Laplacian: Li Wei, R. P. Agarwal, and P. J. Y. Wong; Volume 12, No.2, pp. 195-207; Link PDF
Fixed point theory for weakly sequentially upper semicontinuous maps with applications to differential inclusions: R. P. Agarwal and D. O'Regan; Volume 5, No.3, pp. 287-296; Link PDF
Optimal existence theory for single and multiple positive periodic solutions to functional differential equations: D. Jiang, D. O'Regan, and R. P. Agarwal; Volume 6, No.3, pp. 334-345; Link PDF