@article{BAG_1981__12_138215,
     author = {G. RICHTER},
     title = {Generalization of a theorem of {KERT\'ESZ}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {117--121},
     year = {1981},
     volume = {12},
     url = {http://geodesic.mathdoc.fr/item/BAG_1981__12_138215/}
}