1. Foundations of Mechanics;Abraham,1978
2. Circular symmetry and stationary phase approximations;Atiyah,1985
3. En marge de l'apologie de Witten;Bennequinn;Gazette des Mathématiciens No. 50,1989
4. Manifolds All of Whose Geodesics are Closed;Besse,1978
5. Global representations of the diffeomorphism group of the circle;Bien,1989