@article{CM_1968__20__133_0, author = {Lorenzen, Paul}, title = {Constructive mathematics as a philosophical problem}, journal = {Compositio Mathematica}, volume = {20}, year = {1968}, pages = {133-142}, mrnumber = {224426}, zbl = {0169.29302}, language = {en}, url = {http://dml.mathdoc.fr/item/CM_1968__20__133_0} }
Lorenzen, P. Constructive mathematics as a philosophical problem. Compositio Mathematica, Tome 20 (1968) pp. 133-142. http://gdmltest.u-ga.fr/item/CM_1968__20__133_0/