Van Groesen, E. W. C. Existence of multiple normal mode trajectories on convex energy surfaces of even, classicial Hamiltonian systems - Nijmegen: Catholic University, Department of Mathematics, 1983. - 30p.: 21cm. Includes bibliographical references Subjects--Topical Terms: Convex surfacesHamiltonian systems LC Class. No.: QA3.R46 no.8306