@Article{Agarwal2008, author=" R. P. Agarwal, M. A. El-Gebeily, D. O'Regan", title="Generalized contractions in partially ordered metric spaces", journal="Appl. Anal. ", year="2008", pages="1-8. ", volume="87" } @Article{Altun2010, author="I. Altun, H. Simsek", title="Some fixed point theorems on ordered metric spaces and application", journal=" Fixed Point Theory Appl., Article ID 621492", year="2010", pages="20 pages. ", volume="2010" } @Article{Amini-Harandi2010, author="A. Amini-Harandi, H. Emami", title="A fixed point theorem for contraction type maps in partially ordered metric spaces and application to ordinary differential equations", journal="Nonlinear Anal. ", year="2010", pages="2238-2242. ", volume="72" } @Article{Bhaskar2006, author="T. G. Bhaskar, V. Lakshmikantham", title="Fixed point theorems in partially ordered metric spaces and applications", journal="Nonlinear Anal. ", year="2006", pages="1379-1393. ", volume="65" } @Article{Choudhury2010, author="B. Choudhury, A. Kundu", title="A coupled coincidence point result in partially ordered metric spaces for compatible mappings", journal=" Nonlinear Anal. ", year="2010", pages="2524-2531. ", volume="73" } @Article{Ćirić2008, author="Lj. B. Ćirić, N. Cakić, M. Rajović, J. S. Ume", title="Monotone generalized nonlinear contractions in partially ordered metric spaces", journal="Fixed point Theory Appl., Article ID 131294", year="2008", pages="11 pages. ", volume="2008" } @Article{Drici2007, author="Z. Drici, F. A. McRae, J. Vasundhara Devi", title="Fixed-point theorems in partially ordered metric spaces for operators with PPF dependence ", journal="Nonlinear Anal. ", year="2007", pages="641-647.", volume="67" } @Article{Harjani2008, author="J. Harjani, K. Sadarangani", title="Fixed point theorems for weakly contractive mappings in partially ordered sets", journal="Nonlinear Anal. ", year="2008", pages="3403-3410. ", volume="71" } @Article{Harjani2010, author=" J. Harjani, K. Sadarangani", title="Generalized contractions in partially ordered metric spaces and applications to ordinary differential equations", journal="Nonlinear Anal. ", year="2010", pages="1188-1197. ", volume="72" } @Article{Hussain2011, author="N. Hussain, M. H. Shah, M. A. Kutbi", title="Coupled coincidence point theorems for nonlinear contractions in partially ordered quasi-metric spaces with a Q-function", journal="Fixed point Theory Appl., Article ID 703938", year="2011", pages=" 21 pages. ", volume="2011" } @Article{Lakshmikantham2009, author="V. Lakshmikantham, Lj. B. Ćirić", title="Coupled fixed point theorems for nonlinear contractions in partially ordered metric spaces", journal="Nonlinear Anal. ", year="2009", pages="4341-4349. ", volume="70" } @Article{Nashine2011, author="H. K. Nashine, I. Altun", title="Fixed point theorems for generalized weakly contractive condition in ordered metric spaces", journal="Fixed point Theory Appl., Article ID 132367", year="2011", pages="20 pages. ", volume="2011" } @Article{Nashine2011, author="H. K. Nashine, B. Samet", title="Fixed point results for mappings satisfying (\(\psi,\varphi\))-weakly contractive condition in partially ordered metric spaces", journal="Nonlinear Anal. ", year="2011", pages="2201-2209. ", volume="74" } @Article{Nashine2011, author="H. K. Nashine, B. Samet, C. Vetro", title="Monotone generalized nonlinear contractions and fixed point theorems in ordered metric spaces", journal="Math. Comput. Modelling ", year="2011", pages="712-720. ", volume="54" } @Article{Nieto2005, author=" J. J. Nieto, R. R. Lopez", title="Contractive mapping theorems in partially ordered sets and applications to ordinary differential equations", journal="Order ", year="2005", pages="223-239. ", volume="22" } @Article{Nieto2007, author="J. J. Nieto, R. R. Lopez ", title="Existence and uniqueness of fixed point in partially ordered sets and applications to ordinary differential equations", journal="Acta Math. Sinica, Engl. Ser. ", year="2007", pages="2205-2212.", volume="23" } @Article{Ran2004, author=" A. C. M. Ran, M. C. B. Reurings", title="A fixed point theorem in partially ordered sets and some applications to matrix equations", journal="Proc. Amer. Math. Soc. ", year="2004", pages="1435-1443.", volume="132" } @Article{O'Regan2008, author="D. O'Regan, A. Petrutel ", title="Fixed point theorems for generalized contractions in ordered metric spaces", journal="J. Math. Anal. Appl. ", year="2008", pages="1241-1252. ", volume="341" } @Article{Samet2010, author="B. Samet", title="Coupled fixed point theorems for a generalized Meir-Keeler contraction in partially ordered metric spaces", journal="Nonlinear Anal. ", year="2010", pages=" 4508-4517. ", volume="72" } @Article{Shatanawi 2010, author="W. Shatanawi ", title="Partially ordered cone metric spaces and coupled fixed point results", journal="Comput. Math. Appl.", year="2010", pages="2508-2515. ", volume="60" } @Article{Wu 2008, author="Y. Wu ", title="New fixed point theorems and applications of mixed monotone operator", journal="J. Math. Anal. Appl.", year="2008", pages="883-893. ", volume="341" } @Article{Wu2006, author="Y. Wu, Z. Liang", title="Existence and uniqueness of fixed points for mixed monotone operators with applications", journal="Nonlinear Anal. ", year="2006", pages="1913-1924.", volume="65" }