TY  - JOUR
AU  - P. P. Zabreiko
TI  - Tangential vectors for sets defined with systems of equations
JO  - Trudy Instituta matematiki
PY  - 2012
SP  - 42
EP  - 49
VL  - 20
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TIMB_2012_20_1_a4/
LA  - ru
ID  - TIMB_2012_20_1_a4
ER  -