1. Ann. New York Acad. Sci. 728;SG Matthews,1994
2. Hussain N, Kadelburg Z, Radenovic S, Al-Solamy FR: Comparison functions and fixed point results in partial metric spaces. Abstr. Appl. Anal. 2012., 2012: Article ID 605781
3. 30;IA Bakhtin,1989
4. Czerwik S: Contraction mappings in b -metric spaces. Acta Math. Inform. Univ. Ostrav. 1993, 1: 5–11.
5. Hussain N, Djorić D, Kadelburg Z, Radenović S: Suzuki-type fixed point results in metric type spaces. Fixed Point Theory Appl. 2012., 2012: Article ID 126