@article{1093883180, author = {Bencivenga, Ermanno}, title = {A weak free logic with the existence sign.}, journal = {Notre Dame J. Formal Logic}, volume = {21}, number = {1}, year = {1980}, pages = { 572-576}, language = {en}, url = {http://dml.mathdoc.fr/item/1093883180} }
Bencivenga, Ermanno. A weak free logic with the existence sign.. Notre Dame J. Formal Logic, Tome 21 (1980) no. 1, pp. 572-576. http://gdmltest.u-ga.fr/item/1093883180/