References:

• Vortex Flow in Nature and Technology - by Hans J Lugt (1983), A wiiley-Interscience Publication

• The Winds - The Origins and Behaviour of Atmospheric Motion By George M. Hidy, D Van Nostrand Company, Inc.


• Tornado Alley - by Howard B. Bluestein (1999), Oxford University Press

• Thunderstorm, Tornadoes, and Building Damage - by Joe R. Eagleman, Vincent U. Muirhead, Nicholas Willems, (1975), Lexington Books

• Elementary Fluid Dynamics - by  D. J. Acheson (1990), Clarendon Press, Oxford

• http://www.spc.noaa.gov/faq/tornado/torscans.htm

• http://www.cimms.ou.edu/%7Edoswell/a_tornado/Laverne.JPG

• http://hurricanes.noaa.gov/images 
  

• http://ww2010.atmos.uiuc.edu/(Gh)/home.rxml
  

• www.animationlibrary.com
  

• http://www.steves-templates.com/