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@article{NUMA_1987__55_4_133377, author = {Marcin Studniarski}, title = {An {Algorithm} for {Calculating} {One} {Subgradient} of a {Convex} {Function} of {Two} {Variables.}}, journal = {Numerische Mathematik}, pages = {685--694}, publisher = {mathdoc}, volume = {55}, number = {4}, year = {1987}, zbl = {0671.65044}, url = {http://geodesic.mathdoc.fr/item/NUMA_1987__55_4_133377/} }
Marcin Studniarski. An Algorithm for Calculating One Subgradient of a Convex Function of Two Variables.. Numerische Mathematik, Tome 55 (1987) no. 4, pp. 685-694. http://geodesic.mathdoc.fr/item/NUMA_1987__55_4_133377/