%0 Journal Article
%A Duff, G. F. D.
%T Hyperbolic Differential Equations and Wave Propagation
%J Canadian mathematical bulletin
%D 1977
%P 405-428
%V 20
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-062-2/
%R 10.4153/CMB-1977-062-2
%F 10_4153_CMB_1977_062_2