1. Aghajani, A., Abbas, M., Roshan, J.R.: Common fixed point of generalized weak contractive mappings in partially ordered b-metric spaces. To appear in Mathematica Slovaka (2013)
2. Bakhtin I.A.: The contraction mapping principle in quasimetric spaces. Funct. Anal. Unianowsk Gos. Ped. Inst. 30, 26–37 (1989)
3. Khamski M.A., Hussain N.: KKM mappings in metric type spaces. Nonlinear Anal. 73(9), 3123–3129 (2010)
4. Boriceanu, M., Bota, M., Petrusel, A.: Mutivalued fractals in b-metric spaces. Cen. Eur. J. Math 8(2), 367–377 (2010)
5. Bota M., Molnar A., Csaba V.: On Ekeland’s variational principle in b-metric spaces. Fixed Point Theory 12, 21–28 (2011)