P. Mushahary, S. R. Sahu, and J. Mohapatra, "Spline approximation method for singularly perturbed differential-difference equation on nonuniform grids", International Journal of Modeling, Simulation, and Scientific Computing, vol.12, no.1, pp.2150005, Inderscience, January 2021,
10.1142/S1793962321500057
Article