@article{GDZPPN001183168,
title = {An Algorithm for Calculating One Subgradient of a Convex Function of Two Variables.},
journal = {Numerische Mathematik},
volume = {55},
year = {1987},
pages = {685-694},
zbl = {0671.65044},
url = {http://dml.mathdoc.fr/item/GDZPPN001183168}
}
Studniarski, Marcin. An Algorithm for Calculating One Subgradient of a Convex Function of Two Variables.. Numerische Mathematik, Tome 55 (1987) pp. 685-694. http://gdmltest.u-ga.fr/item/GDZPPN001183168/