http://en.wikipedia.org/wiki/Ohm%27s_law#Temperature_effects [May 04, 2008]
http://www.the12volt.com/ohm/ohmslaw.asp [May 04, 2008]
http://www.grc.nasa.gov/WWW/K-12/Sample_Projects/Ohms_Law/ohmslaw.html  [May 04, 2008]
http://www.physics.uoguelph.ca/tutorials/ohm/Q.ohm.intro.html [May 04, 2008]