@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/