1. Atomic Power in Space—A History, Report, DOE/ NE/32117-H1 (Washington, D.C.: U.S. Department of Energy, 1987).
2. W.C. Hall, “Terrestrial Applications of Thermoelectric Generators,” CRC Handbook on Thermoelectrics, ed. D.M. Rowe (Boca Raton, FL: CRC Press, 1995), pp. 40, 503–513.
3. G. Guazzoni, “Thermoelectric Generators for Military Applications,” Proc. 4th Int. Conf. on Thermoelectrics (Arlington, TX: University of Texas at Arlington, 1982), pp. 1–6.
4. D.M. Rowe, editor, CRC Handbook on Thermoelectrics (Boca Raton, FL: CRC Press, 1995).
5. Annual Energy Review (Washington, D.C.: Energy Information Administration, 2007).