TY  - JOUR
AU  - J. Brinkhuis
TI  - On the Fermat--Lagrange principle for mixed smooth convex extremal problems
JO  - Sbornik. Mathematics
PY  - 2001
SP  - 641
EP  - 649
VL  - 192
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2001_192_5_a0/
LA  - en
ID  - SM_2001_192_5_a0
ER  -