Dixit, Sharad Kumar. “A Simplified Homotopy Perturbation Method for Solving Nonlinear Ill-Posed Operator Equations in Hilbert Spaces”. J. Numer. Anal. Approx. Theory (June 30, 2025). Accessed September 2, 2025. https://www.ictp.acad.ro/jnaat/journal/article/view/1544.