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E-škola Arhivirano 2014-10-16 na Wayback Machine-u Atmosferski elektricitet
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Charman, Neil (14 December 1972). „The enigma of ball Lightning”. New Scientist (Reed Business information) 56 (824): 632–635. ISSN 0262-4079. Arhivirano iz originala na datum 2023-01-19. Pristupljeno 10 May 2010.

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Charman, Neil (14 December 1972). „The enigma of ball Lightning”. New Scientist (Reed Business information) 56 (824): 632–635. ISSN 0262-4079. Arhivirano iz originala na datum 2023-01-19. Pristupljeno 10 May 2010.