• The Complete Patents of Nikola Tesla, http://www.hbci.com/~wenonah/new/tesla.htm
  
• Nikola Tesla, Wikipedia, http://en.wikipedia.org/wiki/Nikola_Tesla
• Nikola Tesla Memorial Society of New York, http://www.teslasociety.com/
• Induction Motors, http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/indmot.html
• PBS Tesla-Master of Lightning, http://www.pbs.org/tesla/ins/lab_tescoil.html
• University Physics With Modern Physics, New York, 2010, Wolfgang Bauer, Gary Westfall
  

        (1)-The Complete Patents of Nikola Tesla
        (2)-Tesla Coil, Wikipedia
        (3)-Nikola Tesla, Wikipedia