@article{1195521985, author = {Is\'eki, Kiyoshi}, title = {On axiom systems of propositional calculi, XXI}, journal = {Proc. Japan Acad.}, volume = {42}, number = {5}, year = {1966}, pages = { 441-442}, language = {en}, url = {http://dml.mathdoc.fr/item/1195521985} }
Iséki, Kiyoshi. On axiom systems of propositional calculi, XXI. Proc. Japan Acad., Tome 42 (1966) no. 5, pp. 441-442. http://gdmltest.u-ga.fr/item/1195521985/