Allain, Rhett. "Olympic Physics: Swimming, Power and Setting Records." 4 August 2012. Wired. Web. Nov 2014. <http://www.wired.com/2012/08/olympics-physics-swimming/>.

Benson, Tom. "The Drag Equation." n.d. NASA. Web. November 2014. <http://exploration.grc.nasa.gov/education/rocket/drageq.html>.

"Buoyancy Formula." n.d. TutorVista. Web. November 2014. <http://formulas.tutorvista.com/physics/buoyancy-formula.html>.

"Drag Force." n.d. Real World Physics Problems. Web. Nov 2014. <http://www.real-world-physics-problems.com/drag-force.html>.

Knight, Randall D. Physics: For Scientists and Engineers-a strategic approach. 3rd. Boston, New York...: Pearson, 2013. Book.

M., Kerrin. Physics of Swimming. 2002-2003. Web. November 2014. <http://www.east-buc.k12.ia.us/02_03/CE/km/tp.htm>.

Monteiro, Rodrigo. "The guide to implementing 2D platformers." 20 May 2012. Higher-Order Fun: Game Design & Game Programming. Web. November 2014. <http://higherorderfun.com/blog/2012/05/20/the-guide-to-implementing-2d-platformers/>.

Normani, Franco. "The Physics of Skydiving." n.d. Real World Physics Problems. Web. November 2014. <http://www.real-world-physics-problems.com/physics-of-skydiving.html>.

Totilo, Stephen. "Sink or Swim? The Game Designer's Conundrum." 2 July 2009. Kotaku. Web. November 2014. <http://kotaku.com/5306343/sink-or-swim-the-game-designers-conundrum >.

(Picture of pen above is from Dieter Schneider who also made this web template)