de Boer, E. (1959). "Acoustic Interaction in Vented Loudspeaker Enclosures". The Journal of the Acoustical Society of America. 31 (2): 246–247. Bibcode:1959ASAJ...31..246D. doi:10.1121/1.1907703.
Novak, J. (1959). "Performance of enclosures for low-resonance high-compliance loudspeakers". IRE Transactions on Audio. AU-7 (1): 5–13. doi:10.1109/TAU.1959.1166180.
de Boer, E. (1959). "Acoustic Interaction in Vented Loudspeaker Enclosures". The Journal of the Acoustical Society of America. 31 (2): 246–247. Bibcode:1959ASAJ...31..246D. doi:10.1121/1.1907703.
psaudio.com
McGowan, Paul (April 30, 2013). "Passively radiating". psaudio.com. Archived from the original on 2016-11-27. Retrieved 2019-11-20.
storage.googleapis.com
patentimages.storage.googleapis.com
Thuras, A. L. (1932). "Sound Translating Device"(PDF). U.S. Patent No. 1,869,178, Application Aug. 15 1930, Patented July 26, 1932. Retrieved 2022-07-02.
web.archive.org
McGowan, Paul (April 30, 2013). "Passively radiating". psaudio.com. Archived from the original on 2016-11-27. Retrieved 2019-11-20.