@article{10_4064_fm_92_3_173_207,
     author = {Gerhard Osius},
     title = {Eine {Erweiterung} der {NGB-Mengenlehre} als {Grundlage} der {Kategorientheorie}},
     journal = {Fundamenta Mathematicae},
     pages = {173--207},
     publisher = {mathdoc},
     volume = {92},
     number = {3},
     year = {1976},
     doi = {10.4064/fm-92-3-173-207},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-92-3-173-207/}
}