TY  - JOUR
AU  - V. B. Kolmanovskii
TI  - Solutions of constant sign for equations of neutral type
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1116
EP  - 1119
VL  - 7
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_6_a19/
LA  - ru
ID  - DE_1971_7_6_a19
ER  -