1. Foundations of Mechanics;Abraham,1967
2. Transversal Mappings and Flows;Abraham,1967
3. Homeomorphisms of systems of differential equations;Grobman;Dokl. Akad. Nauk,1959
4. Topological classification of the neighborhood of a singular point in n-dimensional space;Grobman;Mat. Sb.,1962
5. A lemma in the theory of structural stability of differential equations;Hartman;Proc. Am. math. Soc.,1960