TY  - JOUR
AU  - A. M. Zverkin
TI  - Comparison theorems for oscillatory solutions of equations with lag
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 1951
EP  - 1956
VL  - 13
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_11_a5/
LA  - ru
ID  - DE_1977_13_11_a5
ER  -