References
Books
1. Gates, Earl. Introduction to electronics. Clifton Parks, NY: Delmar, 2011.
2. Cox, James. Fundamentals of linear electronics: integrated and discrete. Albany: Delmar Thomson Learning, 2002.
3. Horowitz, Paul. The art of electronics. Cambridge England New York: Cambridge University Press, 1989.
4. Harrison, Linden. Current sources & voltage references. Amsterdam New York: Newnes, 2005.
Webliography
1. Zener Diode, Wikipedia
2. Zener Diode, problems
3. What is a Zener Diode-reuk.co.uk