@article{1093894377,
author = {Pollock, John L.},
title = {Henkin style completeness proofs in theories lacking negation.},
journal = {Notre Dame J. Formal Logic},
volume = {12},
number = {1},
year = {1971},
pages = { 509-511},
language = {en},
url = {http://dml.mathdoc.fr/item/1093894377}
}
Pollock, John L. Henkin style completeness proofs in theories lacking negation.. Notre Dame J. Formal Logic, Tome 12 (1971) no. 1, pp. 509-511. http://gdmltest.u-ga.fr/item/1093894377/