@misc{MZ_1924__19_167770,
     title = {Vietoris, {L.,} {Zur} {Geometrie} ebener {Massenanziehungsprobleme.} {(Aus}                   einem {Briefe} an {E.Str\"omgren} in {Kopenhagen)}},
     journal = {Mathematische Zeitschrift},
     pages = {130--135},
     publisher = {mathdoc},
     volume = {19},
     year = {1924},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/MZ_1924__19_167770/}
}