@article{MAN_1938__115_159947,
     author = {W. ACKERMANN},
     title = {Mengentheoretische {Begr\"undung} der {Logik}},
     journal = {Mathematische Annalen},
     pages = {1--22},
     year = {1938},
     volume = {115},
     zbl = {0017.24201},
     url = {http://geodesic.mathdoc.fr/item/MAN_1938__115_159947/}
}