1. S. A. Blokhin, S. B. Yazvenko, V. L. Vladimirov, and S. I. Lagerev, in Proc. Conf. Marine Mammals in Far Arctic Areas (Listvyanka, Sept. 11–13, 2002).
2. O. Yu. Tyurneva, M. K. Maminov, E. P. Shvetsov, V. I. Fadeev, N. I. Selin, and Yu. M. Yakovlev, in Proc. 4th Int. Conf. Marine Mammals in Holarctic (St. Petersburg Univ., 2006), p. 530 [in Russian].
3. V. A. Vladimirov, S. P. Starodymov, A. G. Afanas’ev-Grigor’ev, and M. S. Kornienko, Issled. Vodn. Biol. Resur. Kamchatki Sev.-Zapadn. Chasti Tikhogo Okeana, No. 19, 50 (2010).
4. M. V. Kruglov and A. N. Rutenko, in Proc. 11th School-Seminar Named after L. M. Brekhovskikh Academician “Ocean Acoustics” (GEOS, Moscow, 2006), p. 340 [in Russian].
5. A. N. Rutenko and V. A. Gritsenko, Acoust. Phys. 56 (1), 72 (2010).