References

http://www.physicscentral.com/news/news-01-5.html

http://www.npl.uiuc.edu/~a-nathan/pob/chicago-tribune.html

http://abcnews.go.com/sections/science/DailyNews/baseball980908.html

http://www.turnerlearning.com/efts/bball/equate.htm

http://farside.ph.utexas.edu/~rfitzp/teaching/301/lectures/node107.html

http://www.exploratorium.edu/baseball/sweetspot.html

http://www.npl.uiuc.edu/~a-nathan/pob/

http://www.bostonbaseball.com/whitesox/physics.html

http://newton.ex.ac.uk/aip/physnews.542.html

http://www.aip.org/enews/physnews/1998/split/pnu388-2.htm