@article{1183733916, author = {Angell, R. B.}, title = {The Sentential Calculus Using Rule of Inference $R\_e$}, journal = {J. Symbolic Logic}, volume = {25}, number = {1}, year = {1960}, language = {en}, url = {http://dml.mathdoc.fr/item/1183733916} }
Angell, R. B. The Sentential Calculus Using Rule of Inference $R_e$. J. Symbolic Logic, Tome 25 (1960) no. 1, . http://gdmltest.u-ga.fr/item/1183733916/