1. E. V. Semenov, ?On a problem of hydrodynamic stability theory in the case of variable viscosity?, Izv. AN SSSR, OTN, Mekhanika i mashinostroenie, no. 4, 1964.
2. E. V. Semenov, ?On the development of waves on the surface of films with variable viscosity in a gas stream?, Izv. AN SSSR, OTN, Mekhanika i mashinostroenie, no. 5, 1964.
3. P. G. Drazin, ?On stability of parallel flow of an incompressible fluid of variable density and viscosity?, Proceedings of the Cambridge Philosophical Society,58, no. 4, 1967.
4. R. C. Di Prima and D. W. Dunn, ?The effect of heating and cooling on the stability of the boundary layer flow of a liquid over a curved surface?, Journal of the Aeronautical Sciences,23, no. 10, 1956.
5. M. Morduchow, ?Stability of laminar boundary layer near a stagnation point over an impermeable wall and a wall cooled by normal fluid injection?, Advis. Comm. Aeronaut. Techn. Notes, no. 4037, 1957.