1. Zagorskii, L.S., Shkuratnik, V.L., and Pustovoitova, N.A., Increase in the Information Content of the Resonance Acoustic Method for Determination of the Rock Mass Properties, Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., 2004, no. 4, p. 35 [J. Min. Sci., vol. 40, no. 4, p. 350].
2. Pustovoitova, N.A. and Shkuratnik, V.L., The Modified Resonance Acoustic Method in the Site Survey during Metropolitan Railway Construction, Gorn. Inform.-Analit. Byull., 2008, no. 6.
3. Kabanikhin, S.I., Proektsionno-raznostnye metody opredeleniya koeffitsientov giperbolicheskikh uravnenii (Finite-Difference Methods in Calculation of the Hyperbolic Equation Coefficients), Novosibirsk: Nauka, 1988.
4. Zagorskii, L.S., Spektral’nye metody opredeleniya stroeniya gornogo massiva (Spectral Methods of Rock Mass Structure Determination), Acad. Strakhov, V.N., Ed., Moscow: “Graal” Publisher, 2001.
5. Nazarov, L.A., Determination of Properties of Structured Rock Mass by the Acoustic Method, Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., 1999, no. 3, p. 36 [J. Min. Sci., vol. 35, no. 3, p. 240].