TY  - JOUR
AU  - E. B. Frid
TI  - On the semiregularity of boundary points for nonlinear equations
JO  - Sbornik. Mathematics
PY  - 1974
SP  - 483
EP  - 507
VL  - 23
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1974_23_4_a1/
LA  - en
ID  - SM_1974_23_4_a1
ER  -