TY  - JOUR
AU  - Clarke, F. H.
AU  - Redheffer, R. M.
TI  - The Proximal Subgradient and Constancy
JO  - Canadian mathematical bulletin
PY  - 1993
SP  - 30
EP  - 32
VL  - 36
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-005-9/
DO  - 10.4153/CMB-1993-005-9
ID  - 10_4153_CMB_1993_005_9
ER  -