@article{CMUC_1978_19_1_a18,
     author = {Elster, Karl-Heinz and Nehse, Reinhard},
     title = {Separation of two convex sets by operators},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {191--206},
     year = {1978},
     volume = {19},
     number = {1},
     mrnumber = {0477685},
     zbl = {0373.46010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1978_19_1_a18/}
}