@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/}
}