TY  - JOUR
AU  - V. S. Mokeichev
TI  - Periodic boundary value problems for certain differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 2087
EP  - 2092
VL  - 5
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_11_a14/
LA  - ru
ID  - DE_1969_5_11_a14
ER  -