1. R. W. Zeren and W. C. Reynolds, ?Thermal instabilities in two-fluid horizontal layers,? J. Fluid Mech.,53, No. 2 (1972).
2. E. I. Berezovskii, T. L. Perel'man, and E. A. Romashko, ?Convective instability in a system of two inorganic horizontal layers of immiscible liquids,? Inzh. Fiz. Zh.,27, No. 6 (1974).
3. E. N. Ferm and D. J. Wollkind, ?Onset of Rayleigh-Bernard-Marangoni instability: comparison between theory and experiment,? J. Non-Equilib. Thermodyn.,7, No. 3 (1982).
4. G. Z. Gershun and E. M. Zhukhovitskii, ?Monotonic and oscillatory instability of a two-layer system of immiscible liquids heated from below,? Dokl. Akad. Nauk SSSR,265, No. 2 (1982).
5. G. Z. Gershun, E. M. Zhukhovitskii, and E. A. Pershina, ?Development of convection in some two-layer systems,? in: Convective Flows [in Russian], Perm' (1983).