1. N. Tesla, Apparatus for transmitting electrical energy, U.S. patent 1, 119, 732 (1914)
2. N. Tesla, Nikola Tesla: Lectures, Patents, Articles, Nikola Tesla Museum, Beograd Yugoslavia, p.A109 (1956)
3. N. Tesla, A. Marincic, V. Popovic, T. Teofilovic, Colorado springs notes. Nolit Beograd, Yugoslavia 3, 1899–1900 (1978)
4. A. Kurs, A. Karalis, R. Moffatt, J.D. Joannopoulos, P. Fisher, M. Soljačić, Wireless power transfer via strongly coupled magnetic resonance. Science 317, 83–86 (2007)
5. D. Huang, Y. Urzhumov, D.R. Smith, K.H. Teo, J. Zhang, Magnetic superlens-enhanced inductive coupling for wireless power transfer. J. Appl. Phys. 111, 064902 (2012)