TY  - JOUR
AU  - Marcin Studniarski
TI  - An Algorithm for Calculating One Subgradient of a Convex Function of Two Variables.
JO  - Numerische Mathematik
PY  - 1987
SP  - 685
EP  - 694
VL  - 55
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NUMA_1987__55_4_133377/
ID  - NUMA_1987__55_4_133377
ER  -