1. N. S. Shestov, Sources of Radiant Energy [in Russian], Part 1 ( Moscow and Leningrad, Power Engng. Press, 1954 ).
2. H. Buckley, “On the radiation from the inside of a circular cylinder,” Phil. Mag., (7), 4: 753–762 (1927).
3. E. Eckert, Arch. Wärmew. DampfkWes., 16: 135–138 (1935).
4. J. C. De Vos, “Evaluation of the quality of a blackbody,” Physica, 20: 669–689 (1954).
5. E. M. Sparrow and L. U. Albers, “Apparent emissivity and heat transfer in a long cylindrical tube,” J. Heat Transfer, 82: 253–255 (1960).