1.Todar, Kenneth. Bacterial Resistance to Antibiotics. http://www.bact.wisc.edu/microtextbook/disease/bactres.html"

2.Microbes: What Doesn’t Kill Them Makes Them Stronger. http://whyfiles.org/038badbugs/mechanism.html

3.Levy, Stuart B. The Challenge of Antibiotic Resistance. http://www.sciam.com/1998/0398issue/0398levy.html

4.1995 Groiler Encyclopedia

5.Smith, John Maynard. Bacteria Break the Antibiotic Bank. Natural History, Volume 103, Issue 6, June 1994. Pages 30-41.

6.1995 Groiler Encyclopedia

7.Todar, Kenneth. Bacterial Resistance to Antibiotics. http://www.bact.wisc.edu/microtextbook/disease/bactres.html

8.Gersman, Kenneth, MD, MPH. Antibiotic Resistnace and Judicious Antibiotic Use. http://medicalreproter.health.org/tmr0297/antibiotic0297.html

9.Microbes: What Doesn’t Kill Them Makes Them Stronger. http://whyfiles.org/038badbugs/mechanism.html

10.Levy, Stuart B. The Challenge of Antibiotic Resistance. http://www.sciam.com/1998/0398issue/0398levy.html

11.Wright, Anne Puvak. Restoring the Wonder to our 'Wonder Drugs'. AARP Bulletin, January 2001. Vol. 42. No. 1. Washington, D.C. page 27.