Common fixed points of weakly contractive and strongly expansive mappings in topological spaces. Shah, M.H.; Hussain, N.; Khan, A.R. — 2010 Journal of Inequalities and Applications [electronic only]
Coupled coincidence point theorems for nonlinear contractions in partially ordered quasi-metric spaces with a Q -function. Hussain, N.; Shah, M.H.; Kutbi, M.A. — 2011 Fixed Point Theory and Applications [electronic only]