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3. Thiele, A.N., "Loudspeakers in Vented Boxes, Parts I and II", J. Audio Eng. Soc., vol. 19, pp. 382–392 (May 1971); pp. 471–483 (June 1971).
4. Small, R.H., "Direct-Radiator Loudspeaker System Analysis", J. Audio Eng. Soc., vol. 20, pp. 383–395 (June 1972).
5. Small, R.H., "Closed-Box Loudspeaker Systems", J. Audio Eng. Soc., vol. 20, pp. 798–808 (Dec. 1972); vol. 21, pp. 11–18 (Jan./Feb. 1973).
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7. Small, R.H., Margolis, G., "Personal Calculator Programs for Approximate Vented-Box and Closed-Box Loudspeaker System Design.", J. Audio Eng. Soc., vol. 29 pp. 421-441 (Jun 1981)
8. (1998) D'Appolito, Joseph, "Testing Loudspeakers", Audio Amateur Press. ISBN 1882580176