@article{MZ_1958__70_169776,
     author = {Ky Fan},
     title = {On the {Equilibrium} {Value} of a {System} of {Convex} and {Concave} {Functions.}},
     journal = {Mathematische Zeitschrift},
     pages = {271--280},
     publisher = {mathdoc},
     volume = {70},
     year = {1958},
     zbl = {0083.28605},
     url = {http://geodesic.mathdoc.fr/item/MZ_1958__70_169776/}
}