%0 Journal Article
%A Clarke, F. H.
%A Redheffer, R. M.
%T The Proximal Subgradient and Constancy
%J Canadian mathematical bulletin
%D 1993
%P 30-32
%V 36
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-005-9/
%R 10.4153/CMB-1993-005-9
%F 10_4153_CMB_1993_005_9