TY  - JOUR
AU  - L. M. Berkovich
AU  - V. I. Kval'vasser
TI  - Operator identities and certain ordinary linear differential equations of higher orders which are integrable in closed form
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1968
SP  - 3
EP  - 16
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1968_5_a0/
LA  - ru
ID  - IVM_1968_5_a0
ER  -