M. Rahim-Esbo, S. Bayani, R. Mohammadyari, A. K. Asboei, S. Mohsenian, e S. E. Mousavitileboni, “<b>Analytical and Numerical investigation of natural convection in a heated cylinder using Homotopy Perturbation Method”, Acta Sci. Technol., vol. 36, nº 4, p. 669–677, maio 2014.