@article{MZ_1960__73_169835,
     author = {N.K. Stephanidis},
     title = {\"Uber eine {Klasse} von {Strahlensystemen.}},
     journal = {Mathematische Zeitschrift},
     pages = {121--126},
     publisher = {mathdoc},
     volume = {73},
     year = {1960},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1960__73_169835/}
}