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3) J. J. Zwislocki, “An acoustic coupler for earphone calibration,” Special Rep. LSC-S-7 (Syracuse University, Syracuse, New York, 1970).
4) J. J. Zwislocki, “An ear-like coupler for earphone calibration,” Special Rep. LSC-S-9 (Syracuse University, Syracuse, New York, 1971).
5) E. A. G. Shaw, “The external ear,” Handbook of Sensory Physiology, ed. by W. D. Keidel and W. D. Neff (Springer-Verlag, Berlin, 1974), Vol.V/1, Chap. 14, p.472.