Govindaraj, Suganya, and Senthamarai Rathinam. “Approximate Analytical Expression of Diffusive Lotka-Volterra Prey-Predator Equations via Variational Iteration Method”. Journal of Applied Nonlinear Dynamics, vol. 11, no. 3, Aug. 2026, pp. 741-53, https://doi.org/10.5890/JAND.2022.09.013.