TY  - JOUR
AU  - M. A. Krasnosel'skii
AU  - P. E. Sobolevskii
TI  - Non-negative eigenfunction of the first boundary value problem for elliptic equation
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1961
VL  - 16
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1961_16_1_a20/
LA  - ru
ID  - RM_1961_16_1_a20
ER  -