TY  - JOUR
AU  - P. I. Lizorkin
TI  - The Dirichlet principle for the Beltrami equation in a semi-space
JO  - Doklady Akademii Nauk
PY  - 1960
SP  - 761
EP  - 764
VL  - 134
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1960_134_4_a4/
LA  - ru
ID  - DAN_1960_134_4_a4
ER  -