Nave.„Electromagnet“. Hyperphysics. Dept. of Physics and Astronomy, Georgia State Univ. (2012). 2014-yil 22-sentyabrda asl nusxadan arxivlangan. Qaraldi: 2014-yil 17-sentyabr.
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Nave.„Electromagnet“. Hyperphysics. Dept. of Physics and Astronomy, Georgia State Univ. (2012). 2014-yil 22-sentyabrda asl nusxadan arxivlangan. Qaraldi: 2014-yil 17-sentyabr.