1. David, D., Houser, K., Mistrick, R., Steffy, G.: Lighting Handbook, 10th edn. Illuminating Engineering Society, New York City (2007)
2. Hoelen, C., Ansems, J., Deurenberg, P., van Duijneveldt, W., Peeters, M., Steenbruggen, G., Treurniet, T., Valster, A. ter Weeme, J. W. Color Tunable LED Spot Lighting, SPIE, vol. 6337, pp. 63370Q–63370Q-15 (2006)
3. Lasdon, L.S., Fox, R.L., Ratner, M.W.: Nonlinear optimization using the generalized reduced gradient method. RAIRO Oper. Res. Rech. Opér. 8(3), 73–103 (1974)
4. Lasdon, L.S., Waren, A.D., Jain, A., Ratner, M.: Design and testing of a generalized reduced gradient code for nonlinear programming. ACM Trans. Math. Softw. TOMS 4(1), 34–50 (1978)
5. Lin, C.W., Hsu, K.F. Phosphor-Layer Design Optimization for an LED Package by the Generalized Reduced Gradient Method (2014)