TY  - JOUR
AU  - A. G. Vitushkin
TI  - A proof of upper semicontinuity of a set variation
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 1022
EP  - 1025
VL  - 166
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_166_5_a2/
LA  - ru
ID  - DAN_1966_166_5_a2
ER  -