Constructive mathematics as a philosophical problem
Compositio Mathematica, Volume 20  (1968), p. 133-142
@article{CM_1968__20__133_0,
     author = {Lorenzen, Paul},
     title = {Constructive mathematics as a philosophical problem},
     journal = {Compositio Mathematica},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {20},
     year = {1968},
     pages = {133-142},
     zbl = {0169.29302},
     mrnumber = {224426},
     language = {en},
     url = {http://www.numdam.org/item/CM_1968__20__133_0}
}
Lorenzen, P. Constructive mathematics as a philosophical problem. Compositio Mathematica, Volume 20 (1968) , pp. 133-142. http://www.numdam.org/item/CM_1968__20__133_0/