TY - BOOK AU - Van Groesen,E.W.C. TI - Existence of multiple normal mode trajectories on convex energy surfaces of even, classicial Hamiltonian systems AV - QA3.R46 no.8306 PY - 1983/// CY - Nijmegen PB - Catholic University, Department of Mathematics KW - Convex surfaces KW - Hamiltonian systems N1 - Includes bibliographical references ER -