Van Groesen, E. W. C. Undirectional wave propagation in one-dimensional first order Hamiltonian systems - Nijmegen : Catholic University, Department of Mathematics, 1979 - 36p. ; 21cm. - Report 7904 . Includes bibliographical references Subjects--Topical Terms: Hamiltonian systemsWaves LC Class. No.: QA3.R46 no.7904