Frankort, F. J. M. (1975). Vibration and sound radiation of loudspeaker cones. Philips Research Laboratories.
Lua i Stíl Chicago (17ú heag.)Frankort, F. J. M. Vibration and Sound Radiation of Loudspeaker Cones. [Eindhoven, Netherlands: Philips Research Laboratories, 1975.
Lua MLA (8ú heag.)Frankort, F. J. M. Vibration and Sound Radiation of Loudspeaker Cones. Philips Research Laboratories, 1975.
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