1. Local Semi-Dynamical Systems;Bhatia,1969
2. Dynamical Systems: Stability Theory and Applications;Bhatia,1967
3. Weak attractors in dynamical systems;Bhatia;Bol. Soc. Mat. Mex.,1966
4. On the flow outside a closed invariant set; stability, relative stability and saddle sets;Ura;Contrib. Differential Equations,1963
5. Sur le courant extérieur à une region invariante;Ura;Funkcial. Ekvac.,1959