1. Crawford, M., 1972, “Configuration Factor Between Two Unequal, Parallel Coaxial Squares,” ASME Paper No. 72-WA/HT-16, Nov.
2. European Space Agency (ESA), 1989, Spacecraft Thermal Control Design Data, Vol. 1, ESA PSS-03-108, Issue 1, Paris.
3. Howell, J. R., 1982, A Catalog of Radiation Configuration Factors, McGraw-Hill, New York.
4. Siegel, R., and Howell, J. R., 1981, Radiation Heat Transfer, 2nd ed., pp. 233–280.