@article{CM_1937__4__112_0,
     author = {Freudenthal, Hans},
     title = {Zur intuitionistischen {Deutung} logischer {Formeln}},
     journal = {Compositio Mathematica},
     pages = {112--116},
     publisher = {Johnson Reprint Corporation},
     volume = {4},
     year = {1937},
     zbl = {0015.24201},
     language = {de},
     url = {http://archive.numdam.org/item/CM_1937__4__112_0/}
}