1. The First NREL Conference on Thermophotovoltaic Generation of Electricity, ed. T.J. Coutts and J.P. Benner, 321, (New York: American Institute of Physics, New York, 1994).
2. The Second NREL Conference on Thermophotovoltaic Generation of Electricity, ed. J.P. Benner, T.J. Coutts and D.S. Ginley, 358, (New York: American Institute of Physics, New York, 1995).
3. T.J. Coutts, M.W. Wanlass, J.S. Ward and S. Johnson, 25th IEEE Photovoltaics Specialist Conf., (New York: IEEE, 1996), p. 25.
4. The Third NREL Conference on the Thermophotovoltaic Generation of Electricity, Colorado Springs, CO (1997).
5. L.D. Woolf, Solar Cells 19, 19 (1986).