1. I. M. Belov and V. V. Uspenskii, “Clinical measurements of middle-ear impedance with an acoustic bridge,” Vestn. Otorinolar., No. 6, 57 (1970).
2. B. M. Sagalovich and A. A. Drozdov, “Acoustic impedance of the middle ear and its characteristics for people of different age groups,” in: Collected Transactions of the Moscow Scientific-Research Ear, Throat, and Nose Institute [in Russian], No. 18, Moscow, (1973), pp. 170–176.
3. B. S. Moroz and V. G. Bazarov, “Equipment for examining the auditory function by means of an impedance meter,” Zh. Ushn., Nos. Gorl. Bol., No. 1, 115 (1974).
4. Yu. F. Sariush-Zalesskii, V. V. Zalesskii, and V. P. Chernyshev, “The problem of measuring the acoustic impedance of the ear,” in: Current Problems in Otorhinolaryngology [in Russian], Rostov-on-Don (1974), pp. 51–57.
5. A. S. Feldman, “Impedance measurement at the ear drum as an aid to diagnosis,” J. Speech Hearing Res.,6, 315 (1963).