@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/