Zum intuitionistischen Raumbegriff
Compositio Mathematica, Volume 4  (1937), p. 82-111
@article{CM_1937__4__82_0,
     author = {Freudenthal, Hans},
     title = {Zum intuitionistischen Raumbegriff},
     journal = {Compositio Mathematica},
     publisher = {Johnson Reprint Corporation},
     volume = {4},
     year = {1937},
     pages = {82-111},
     zbl = {0015.24103},
     language = {de},
     url = {http://www.numdam.org/item/CM_1937__4__82_0}
}
Freudenthal, Hans. Zum intuitionistischen Raumbegriff. Compositio Mathematica, Volume 4 (1937) , pp. 82-111. http://www.numdam.org/item/CM_1937__4__82_0/