@article{1093893584,
author = {Cocchiarella, Nino B.},
title = {A substitution free axiom set for second order logic.},
journal = {Notre Dame J. Formal Logic},
volume = {10},
number = {1},
year = {1969},
pages = { 18-30},
language = {en},
url = {http://dml.mathdoc.fr/item/1093893584}
}
Cocchiarella, Nino B. A substitution free axiom set for second order logic.. Notre Dame J. Formal Logic, Tome 10 (1969) no. 1, pp. 18-30. http://gdmltest.u-ga.fr/item/1093893584/