| [1] | S. Singer, The Nature of Ball Lightning (Springer 1971, Kindle 2012). |
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| [2] | M. Stenhoff, An Unsolved Problem in Atmospheric Physics (Kluwer, New York 1999). |
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| [3] | A. Bergstrom and S. Campbell, The Ashford “Ball lightning” video explained, Journal of Meteorology 16, 185-190 (1991). |
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| [4] | A. Bergstrom, Electromagnetic theory of strong interaction, Phys. Rev. D8, 4394-4402 (1973). |
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| [5] | J. D. Jackson, Classical Electrodynamics, 3rd Ed. (John Wiley 2011) Sect 14.1. |
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| [6] | ibid., p 664. |
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| [7] | http://en.wikipedia.org/wiki/Liénard-Wiechert_potential retrieved 10 Nov. 2014. |
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| [8] | R. P. Feynman, R. S. Leighton, M. Sands, The Feynman Lectures on Physics (Addison-Wesley 1970), p. II-4-10. |
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| [9] | J. Cen, P. Yuan, S. Xue, Observations of the Optical and Spectral Characteristics of Ball Lightning, Phys. Rev. Lett 112, 035001 (2014). |
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| [10] | R.W.Wood, Plasmoidal High-Frequency Oscillatory Discharges in “Non-Conducting” Vacua, Phys. Rev. 35, 673-693 (1930). |
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| [11] | J. Barry, Ball Lightning and Bead Lightning (Plenum Press 2010), p 127. |
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| [12] | H. Goldstein, Classical Mechanics (Addison-Wesley 1980), pp. 82-85. |
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| [13] | http://en.wikipedia.org/wiki/Virial_theorem retrieved 10 Nov. 2014. |
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| [14] | A. Fröman and P.-O. Löwdin, Virial theorem and cohesive energies of solids, particular ionic crystals, Journal of Physics and Chemistry of Solids 23, 75-84 (1962). |
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| [15] | H. Essén, Effective Shell Charge of Electrons on a Sphere, Theoret. Chim. Acta 63, 365-376 (1983). |
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