TY  - JOUR
AU  - E. M. Landis
TI  - Some problems of the qualitative theory of second order elliptic equations (case of several independent variables)
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1963
SP  - 1
EP  - 62
VL  - 18
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1963_18_1_a0/
LA  - en
ID  - RM_1963_18_1_a0
ER  -