1. Banach, S: Sur les opérations dans les ensembles abstraits et leur applications aux équations intégrales. Fundam. Math. 3, 133-181 (1922)
2. Kirk, WA, Srinivasan, PS, Veeramani, P: Fixed points for mappings satisfying cyclical contractive conditions. Fixed Point Theory 4(1), 79-89 (2003)
3. Nashine, HK: Cyclic generalized ψ-weakly contractive mappings and fixed point results with applications to integral equations. Nonlinear Anal. 75, 6160-6169 (2012)
4. Radenović, S: Some remarks on mappings satisfying cyclical contractive conditions. Afr. Math. (2015). doi: 10.1007/s13370-015-0339-2
5. Radenović, S: A note on fixed point theory for cyclic weaker Meir-Keeler function in complete metric spaces. Int. J. Anal. Appl. 7(1), 16-21 (2015)