@article{1102947972,
author = {Taylor, Peter D.},
title = {Subgradients of a convex function obtained from a directional derivative.},
journal = {Pacific J. Math.},
volume = {49},
number = {2},
year = {1973},
pages = { 739-747},
language = {en},
url = {http://dml.mathdoc.fr/item/1102947972}
}
Taylor, Peter D. Subgradients of a convex function obtained from a directional derivative.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 739-747. http://gdmltest.u-ga.fr/item/1102947972/