TY  - JOUR
AU  - A. M. Panov
TI  - On the theory of the index of systems of difference equations on the plane
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1969
SP  - 71
EP  - 75
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1969_12_a9/
LA  - ru
ID  - IVM_1969_12_a9
ER  -