TY  - JOUR
AU  - P. V. Al'brecht
TI  - On differentiable $\varepsilon$-selections
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1996
SP  - 23
EP  - 26
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1996_2_a4/
LA  - ru
ID  - VMUMM_1996_2_a4
ER  -