1. The General Problem of Stability of Motion;Liapunov,1950
2. The Stability of Motion;Chetayev,1956
3. Certain Problems in the Theory of Stability of Motion;Krasovskiy,1959
4. Analytical methods in probability theory.;Kolmogorov;Progr. math. Sci., Moscow,1938
5. Theory of the correlation of stationary stochastic processes.;Khinchin;Progr. math. Sci., Moscow,1938