@article{1183383743, author = {Chwistek, L. and Hetper, W.}, title = {New Foundation of Formal Metamathematics}, journal = {J. Symbolic Logic}, volume = {3}, number = {1}, year = {1938}, pages = { 1-36}, language = {en}, url = {http://dml.mathdoc.fr/item/1183383743} }
Chwistek, L.; Hetper, W. New Foundation of Formal Metamathematics. J. Symbolic Logic, Tome 3 (1938) no. 1, pp. 1-36. http://gdmltest.u-ga.fr/item/1183383743/