http://www.carnot.org/ENGLISH/carnot%20cycle.htm#Carnot%20Cycle
http://www.geocities.com/Athens/Acropolis/6914/termode.htm
http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Carnot_Sadi.html
http://library.thinkquest.org/C006011/english/sites/carnot_bio.php3?v=2
Serway, Raymond A. Physics for Scientists and Engineers. Belmont, CA: Brooks/Cole-Thomson Learning, 2004
http://en.wikipedia.org/wiki/Nicolas_L%C3%A9onard_Sadi_Carnot