EL-KABEIR, S. M. M. M. M.; EL-HAKIEM, M. A. A.; RASHAD, A. M. M. Natural Convection from a Permeable Sphere Embedded in a Variable Porosity Porous Medium Due to Thermal Dispersion. Nonlinear Analysis: Modelling and Control, [S. l.], v. 12, n. 3, p. 345–357, 2007. DOI: 10.15388/NA.2007.12.3.14693. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/14693.. Acesso em: 19 may. 2024.