@article{MZ_1950__53_169180,
     author = {P. Lorenzen},
     title = {Konstruktive {Begr\"undung} der {Mathematik}},
     journal = {Mathematische Zeitschrift},
     pages = {162--202},
     year = {1950},
     volume = {53},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1950__53_169180/}
}