@article{1183732307, author = {Lob, M. H.}, title = {Formal Systems of Constructive Mathematics}, journal = {J. Symbolic Logic}, volume = {21}, number = {1}, year = {1956}, pages = { 63-75}, language = {en}, url = {http://dml.mathdoc.fr/item/1183732307} }
Lob, M. H. Formal Systems of Constructive Mathematics. J. Symbolic Logic, Tome 21 (1956) no. 1, pp. 63-75. http://gdmltest.u-ga.fr/item/1183732307/