TY  - JOUR
AU  - F. K. Zakirov
TI  - Solutions that are finally of constant sign for nonlinear differential equations with lag
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1975
SP  - 108
EP  - 111
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1975_2_a12/
LA  - ru
ID  - IVM_1975_2_a12
ER  -