TY  - JOUR
AU  - É. A. Polyanskii
TI  - Approximation of the solution of the Helmholtz equation by the solution of an equation of Schr\"odinger type
JO  - Differencialʹnye uravneniâ
PY  - 1984
SP  - 695
EP  - 706
VL  - 20
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1984_20_4_a16/
LA  - ru
ID  - DE_1984_20_4_a16
ER  -