TY  - JOUR
AU  - V. S. Mokeichev
TI  - A criterion for the solvability of certain periodic boundary value problems
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 1335
EP  - 1337
VL  - 13
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_7_a24/
LA  - ru
ID  - DE_1977_13_7_a24
ER  -