Salihu, N., P. Kumam, I. Mohammed Sulaiman, and S. Salihu. “A Descent Matrix-Free Nonlinear Conjugate Gradient Algorithm for Impulse Noise Removal”. Nonlinear Convex Analysis and Optimization: An International Journal on Numerical, Computation and Applications, vol. 3, no. 1, June 2024, pp. 25-46, doi:10.58715/ncao.2024.3.2.