1. Prolongations and generalized Liapunov functions;Auslander,1963
2. Prolongations and stability in dynamical systems;Auslander;Ann. Inst. Fourier Grenoble,1964
3. On asymptotic stability in abstract dynamical systems;Bhatia;Math. Systems Theory,1967
4. Semidynamical flow near a compact invariant set;Bhatia,1968
5. Invariant sets in a monkey saddle;Conley,1967