TY  - JOUR
AU  - Graef, John R.
AU  - Yang, Bo
AU  - Zhang, B. G.
TI  - Existence of nonoscillatory and oscillatory solutions of neutral differential equations with positive and negative coefficients
JO  - Mathematica Bohemica
PY  - 1999
SP  - 87
EP  - 102
VL  - 124
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.1999.125974/
DO  - 10.21136/MB.1999.125974
LA  - en
ID  - 10_21136_MB_1999_125974
ER  -