@article{MS2_1974__34_166346,
     author = {Jochem Zowe},
     title = {Subdifferentiability of {Convex} {Functions} with {Values} in an {Ordered} {Vector} {Space.}},
     journal = {Mathematica Scandinavica},
     pages = {69--83},
     publisher = {mathdoc},
     volume = {34},
     year = {1974},
     zbl = {0288.46007},
     url = {http://geodesic.mathdoc.fr/item/MS2_1974__34_166346/}
}