%0 Journal Article
%A Kusano, Takaŝi
%A Naito, Manabu
%T Nonlinear Oscillation of Fourth Order Differential Equations
%J Canadian journal of mathematics
%D 1976
%P 840-852
%V 28
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-081-0/
%R 10.4153/CJM-1976-081-0
%F 10_4153_CJM_1976_081_0