1. O. Ascher, J. Christiansen and R. D. Russell, A collocation solver for mixed order systems of boundary value problems, Tech. Rep. 77-13 Dept. Computer Sci., Univ. B.C., Vancouver, Canada.
2. Natural convection between horizontal concentric cylinders for low Rayleigh numbers;Mack;Q. Jl Mech. appl. Math.,1968
3. Free convection flow patterns in cylindrical annuli;Powe;Trans. Am. Soc. Mech. Engrs., Series C, J. Heat Transfer,1969
4. Natural convection heat transfer in long horizontal cylindrical annuli;Liu;International Developments in Heat Transfer paper no. 117,1969
5. Photographic studies of natural convection between concentric cylinders;Bishop,1966