1. Geodesic flows on closed Riemannian manifolds with negative curvature;Anosov,1967
2. Tangent bundle connections and the geodesic flow;Chicone,1978
3. A geometric criterion for hyperbolicity of flows;Churchill,1977
4. Periodic flows on three-manifolds;Epstein;Ann. of Math.,1972
5. A quasi-Anosov diffeomorphism that is not Anosov;Franks;Trans. Amer. Math. Soc.,1976