^"Tesla Village". Tesla said: " I am equally proud of my Serbian origin and my Croatian fatherland.". Tesla Memorial Society of NY. Retrieved 10 July 2012.
^"Tesla Timeline". July, 30th: Tesla's American Citizenship Tesla becomes an American citizen. He often told friends that he valued this citizenship more than any scientific honors he'd received.. Tesla Universe. Retrieved 11 July 2012.
^Institute of Electrical and Electronics Engineers, "The IEEE standard dictionary of electrical and electronics terms". 6th ed. New York, N.Y., Institute of Electrical and Electronics Engineers, c1997. IEEE Std 100-1996.ISBN 1-55937-833-6 [ed. Standards Coordinating Committee 10, Terms and Definitions; Jane Radatz, (chair)]
^Dugan, William James, "Hand-book of electro-therapeutics". F.A.Davis Company, 1910. Page 123. "[...] speak of "Tesla currents" when we really mean the high frequency currents."
^Snow, William Benham, "Currents of high potential of high and other frequencies". Scientific authors' publishing Co., 1918. Page 121.
^ abNorrie, H. S., "Induction Coils: How to make, use, and repair them".Norman H. Schneider, 1907, New York. 4th edition.