Malkin，I．G．Certain questions on the theory of the stability of motion in the sense of Lyapunov 1
___，On the stability of motion in the sense of Lyapunov 175
___，Some basic theorems of the theory of stability of motion in critical cases 242
___，On stability under constantly acting disturbances 291
___，Oscillations of systems with one degree of freedom close to systems of Lyapunov 298
___，Oscillations of systems with several degrees of freedon，close to systems of Lyapunov 360
Al＇muhamedov，M．I．On conditions for the existence of stable and unstable centers 389
Bautin，N．N．On the number of limit cycles which appear with the variation of coefficients from an equilibrium position of focus or center type 396
Nemyckiǐ，V．V．Topological problems of the theory of dynamical systems 414
El＇sgol＇c，L．E．An estimate for the number of singular points of a dynamical system defined on a manifold 498