OKEKE, Odwin Amechi; OLALERU, Johnson O. Existence of Fixed Points of Certain Classes of Nonlinear Mappings. International Journal of Mathematical Modelling & Computations, [S. l.], v. 4, n. 4, p. 357–364, 2014. Disponível em: http://oiccpress.com/ijm2c/article/view/11231. Acesso em: 9 may. 2026.