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@article{MZ_1969__109_171130, author = {Seldon Y. Trimble}, title = {The {Convex} {Sum} of {Convex} {Functions.}}, journal = {Mathematische Zeitschrift}, pages = {112--114}, publisher = {mathdoc}, volume = {109}, year = {1969}, zbl = {0175.08101}, url = {http://geodesic.mathdoc.fr/item/MZ_1969__109_171130/} }
Seldon Y. Trimble. The Convex Sum of Convex Functions.. Mathematische Zeitschrift, Tome 109 (1969), pp. 112-114. http://geodesic.mathdoc.fr/item/MZ_1969__109_171130/