1. Heat transfer by natural convection between concentric spheres
2. Natural convection heat transfer between concentric spheres
3. Natural convection flow patterns in spherical annuli
4. S. Patankar, Numerical Heat Transfer and Fluid Flow, Hemisphere Series on Computational Methods in Mechanics and Thermal Science, 1980.
5. Sangita, M.K. Sinha, R.V. Sharma, Numerical simulation of natural convection in a spherical porous annulus. 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, 14–16 July, Florida, 2014.