1. orScientific Papers(Dover, New York, 1965), Vol. II, p. 200.
2. The instability of liquid surfaces when accelerated in a direction perpendicular to their planes. I
3. S. Chandrasekhar,Hydrodynamic and Hydromagnetic Stability(Oxford University, Oxford, 1961), Chap. X.
4. Viscous effects in Rayleigh-Taylor instability