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Nonpropagating string excitations
,”
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Bruce
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A simple explanation of simple nonradiating sources in one dimension—Comment on ‘Nonpropagating string excitations,’ by M. Berry, J. T. Foley, G. Gbur, and E. Wolf [Am. J. Phys. 66 (2), 121–123 (1998)]
,”
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Bruce Denardo, “Quasi-nonradiating wave sources in one dimension” (unpublished).
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Nicholas J. Giordano, Computational Physics (Prentice–Hall, Upper Saddle River, NJ, 1997), pp. 46–47, 84, 351. 
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