US4929278-A  Ashley & Reed, "Sol-Gel AR Films for Solar Applications", presentation at Better Ceramics Through Chemistry II, Materials Research Society Symposium, Apr. 15-18, 1986, published Materials Research Society Proceedings, vol. 73, pp. 671-677, Sep. 1986.;  Ashley, C., & Reed, S., "Sol-Gel-Derived AR Coatings for Solar Receivers", Sandia Report, SAND84-0062, (Sep. 1984), pp. 1-34.;  Lind, M., Pettit, R., Masterson, K., "The Sensitivity of Solar Transmittance, Reflectance and Absorptance to Selected Averaging Procedures and Solar Irradiance Distributions", Journal of Solar Energy Engineering, vol. 102, pp. 34-40 (Feb. 1980).;  Mahoney, Ashley, & Reed, "Sol-Gel Planarized Flexible Solar Mirrors", SAND87-1578A, Solar Thermal Conference, Albuquerque, NM, Aug. 26-27, 1987, viewgraphs printed in SAND87-1258, Aug. 1987.;  Milam, D., "Damage-Resistant Antireflection Surfaces for High-Power Lasers", Energy and Technology Review, Lawrence Livermore Laboratory, Livermore, CA, pp. 9-17 (Mar. 1982).;  Pettit & Brinker, "Use of Sol-Gel Thin Films in Solar Energy Applications", Solar Energy Materials, vol. 14, pp. 268-287, 1986.;  Pettit, R., "Hemispherical Transmittance Properties of Solar Glazings as a Function of Averaging Procedure and Incident Angle", Solar Energy Materials, vol. 1, pp. 125-140 (1979).US4966812-A  Ashley and Reed, "Sol-Gel AR Films For Solar Applications", presentation at Better Ceramics Through Chemistry II, Materials Research Society Symposium, Apr. 15-18, 1986, published Materials Research Society Proceedings, vol. 73, pp. 671-677, Sep. 1986.;  Ashley, C., and Reed, S., "Sol-Gel-Derived AR Coatings for Solar Receivers", Sandia Report, SAND84-0062, (Sep. 1984), pp. 1-34.;  Lind, M., Pettit, R., Masterson, K., "The Sensitivity of Solar Transmittance, Reflectance and Absorptance to Selected Averaging Procedures and Solar Irradiance Distributions", Journal of Solar Energy Engineering, vol. 102, pp,. 34-40 (Feb. 1980).;  Mahoney, Ashley, and Reed, "Sol-Gel Planarized Flexible Solar Mirrors", SAND87-1578A, Solar Thermal Conference, Albuquerque, N.M. Aug., 26-27, 1987, viewgraphs printed in SAND87-1258, Aug. 1987.;  Milam, D., "Damage-Resistant Antireflection Surfaces for High-Power Lasers", Energy and Technology Review, Lawrence Livermore Laboratory, Livermore, Calif., pp. 9-17 (Mar. 1982).;  Pettit and Brinker, "Use of Sol-Gel Thin Films in Solar Energy Applications", Solar Energy Materials, vol. 14, pp. 268-287 1986.;  Pettit, R., "Hemispherical Transmittance Properties of Solar Glazings as a Function of Averaging Procedure and Incident Angle" Solar Energy Materials, vol. 1, pp. 125-140 (1979).