1. Metter, I., Uspekhi fizicheskikh nauk (Advances in Physics), Moscow, 1948, vol. 35, Issue, 5, pp. 52–78.
2. Wilson, R.W., Compressed Air and Hydraulics, 1962, vol. 7, no. 319, pp. 382–385.
3. Bebchuk, A.S., Akustich. Zhurn., 1957, vol. 3, no. 1, pp. 90–91.
4. Bebchuk, A.S., Ibid., 1957, vol. 3, no. 4, pp. 369–371.
5. Obraztsov, V.I., Primenenie ul’traakustiki k issledovaniyu veshchestva (Use of Ultrasonics for Substance Analysis), Nozdrev, V.F., ed., Moscow: MOPI, 1961, Issue 15, pp. 165–178.