In the paper “He’s Homotopy Perturbation Method for Calculating Adomian Polynomials’’ by A. Ghorbani and J. Saberi-Nadjafi, [International Journal of Nonlinear Sciences and Numerical Simulation, 8(2) (2007) 229–232], the authors introduced the homotopy perturbation method to calculate Adomian polynomials, which they claim makes the calculation of Adomian polynomials easy.