1. The influence of radiation on convection in noncircular ducts;Irvine;Amer. Soc. Mech. Engrs, Paper No. 58-A-155,1958
2. Geometrical problems in radiant heat transfer;Hottel,1949
3. Effect of thermal radiation exchange in a tube on convective heat transfer to a transparent gas;Perlmutter;Amer. Soc. Mech. Engrs, Paper 61-WA-169,1961
4. Thermal radiation from a cylindrical enclosure with specified wall heat flux;Usiskin;Trans. ASME J. Heat Transfer,1960