%0 Journal Article
%A Chen, Lu-San
%T A Lyapunov inequality and forced oscillations in general nonlinear nth order differential-difference equations†
%J Glasgow mathematical journal
%D 1977
%P 161-166
%V 18
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003219/
%R 10.1017/S0017089500003219
%F 10_1017_S0017089500003219