@article{1093894371, author = {Reichbach, Juliusz}, title = {Some methods of formal proofs. III.}, journal = {Notre Dame J. Formal Logic}, volume = {12}, number = {1}, year = {1971}, pages = { 479-482}, language = {en}, url = {http://dml.mathdoc.fr/item/1093894371} }
Reichbach, Juliusz. Some methods of formal proofs. III.. Notre Dame J. Formal Logic, Tome 12 (1971) no. 1, pp. 479-482. http://gdmltest.u-ga.fr/item/1093894371/