@article{1093956425,
author = {Skolem, Thoralf},
title = {Investigations on a comprehension axiom without negation in the defining propositional functions.},
journal = {Notre Dame J. Formal Logic},
volume = {1},
number = {1-2},
year = {1960},
pages = { 13-22},
language = {en},
url = {http://dml.mathdoc.fr/item/1093956425}
}
Skolem, Thoralf. Investigations on a comprehension axiom without negation in the defining propositional functions.. Notre Dame J. Formal Logic, Tome 1 (1960) no. 1-2, pp. 13-22. http://gdmltest.u-ga.fr/item/1093956425/