1. American Mathematical Society Colloquium Publications, Vol. IX;Birkhoff, George D.,1966
2. Stable manifolds and hyperbolic sets;Hirsch, Morris W.,1970
3. Neighborhoods of hyperbolic sets;Hirsch, M.;Invent. Math.,1969
4. On Morse-Smale dynamical systems;Palis, J.;Topology,1968
5. \bysame, A note on Ω-stability, Proc. Sympos. Pure Math., vol. 14, Amer. Math. Soc., Providence, R. I., 1970. MR 41 #7686.