1. Ovsyannikov, L.V., Models of two-layer “shallow water”, Prikl. Mekh. Tekh. Fiz., 1979, no. 2, pp. 3–14.
2. Ovsyannikov, L.V., Makarenko, N.I., Nalimov, V.I., et al., Nelineinye problemy teorii poverkhnostnykh i vnutrennikh voln (Nonlinear Problems of the Theory of Surface and Internal Waves), Novosibirsk: Nauka, 1985.
3. Lyapidevskii, V.Yu. and Teshukov, V.M., Matematicheskie modeli rasprostraneniya dlinnykh voln v neodnorodnoi zhidkosti (Mathematical Models of Propagation of Long Waves in an Inhomogeneous Liquid), Novosibirsk: Siberian Branch RAS, 2000.
4. Gerwin, R.A., Stability of the interface between two fluids in relative motion, Rev. Mod. Phys., 1968, vol. 40, no. 3, pp. 652–658.
5. Stepanyants, A.L. and Fabrikant, A.L., Rasprostranenie voln v sdvigovykh potokakh (Wave Propagation in Shear Flows), Moscow: Nauka, 1996.