1. Guo, S.Y., and Russel, K.J.: ‘Brightness compensation for LED lighting based on ambient temperature’, (US Patent 6 693 394)
2. A novel temperature-stable light-emitting diode
3. ‘Applications of PIN Diode’:Hewlett-Packard Co.Palo Alto, CA, Application Note No. 922, May 1973
4. Maas, S.A.: ‘Nonlinear microwave circuit’, (Artech House, Norwood, MA 1988)