@article{JRAM_1924__153_149533,
     author = {Karl Boecklen},
     title = {Bemerkung zu {Herrn} {A.} {Fraenkel's} {Aufsatz} },
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {61--65},
     publisher = {mathdoc},
     volume = {153},
     year = {1924},
     zbl = {49.0094.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1924__153_149533/}
}