1. E. H Bishop, R. S. Kolflat, L. R. Mack and J. A. Scanlan, Convective heat transfer between concentric spheres, Proc. 1964 Heat Transfer Fluid Mech. Inst., pp. 69–80. Stanford Univ. Press.
2. Heat transfer by natural convection between concentric spheres;Bishop;Int. J. Heat Mass Transfer,1966
3. Free convective flow patterns in cylindrical annuli;Powe;J. Heat Transfer,1969
4. Natural convection heat transfer between concentric spheres;Scanlan;Int. J. Heat Mass transfer,1970
5. Heat transfer by natural convection between isothermal concentric spheres;Bishop,1964