TY  - JOUR
AU  - Singh, Bhagat
TI  - A Necessary and Sufficient Condition for the Oscillation of an Even Order Nonlinear Delay Differential Equation
JO  - Canadian journal of mathematics
PY  - 1973
SP  - 1078
EP  - 1089
VL  - 25
IS  - 5
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-115-0/
DO  - 10.4153/CJM-1973-115-0
ID  - 10_4153_CJM_1973_115_0
ER  -