Solvability of a recursive functional equation in the sequence Banach space. J. Caballero; J. Harjani; B. L. López; K. Sadarangani — 2007 Extracta Mathematicae
Existence and uniqueness of positive and nondecreasing solutions for a class of singular fractional boundary value problems. Mena, J.Caballero; Harjani, J.; Sadarangani, K. — 2009 Boundary Value Problems [electronic only]
Contractive-like mapping principles in ordered metric spaces and application to ordinary differential equations. Caballero, J.; Harjani, J.; Sadarangani, K. — 2010 Fixed Point Theory and Applications [electronic only]
A fixed point theorem for mappings satisfying a contractive condition of rational type on a partially ordered metric space. Harjani, J.; López, B.; Sadarangani, K. — 2010 Abstract and Applied Analysis