Okeke, G. A., J. O. Olaleru, and M. O. Olatinwo. “Existence and Approximation of Fixed Point of a Nonlinear Mapping Satisfying Rational Type Contractive Inequality Condition in Complex-Valued Banach Spaces”. International Journal of Mathematical Sciences and Optimization: Theory and Applications, Vol. 2020, no. 1, July 2020, pp. 707 -17, http://ijmso.unilag.edu.ng/article/view/951.