@misc{MZ_1963__81_170135,
     title = {Literatur.},
     journal = {Mathematische Zeitschrift},
     pages = {33--34},
     publisher = {mathdoc},
     volume = {81},
     year = {1963},
     url = {http://geodesic.mathdoc.fr/item/MZ_1963__81_170135/}
}