%0 Journal Article %A Kreith, Kurt %T Oscillation Properties of Weakly Time Dependent Hyperbolic Equations %J Canadian mathematical bulletin %D 1983 %P 368-373 %V 26 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1983-063-2/ %R 10.4153/CMB-1983-063-2 %F 10_4153_CMB_1983_063_2