TY  - JOUR
AU  - Yu. P. Chuburin
TI  - On approximation of the “Membrane” Schrödinger operator by the “Crystal” operator
JO  - Matematičeskie zametki
PY  - 1997
SP  - 773
EP  - 781
VL  - 62
IS  - 5
UR  - http://geodesic.mathdoc.fr/item/MZM_1997_62_5_a13/
LA  - ru
ID  - MZM_1997_62_5_a13
ER  -