@article{1094068846,
author = {Hacker, Edward A. and Parry, William Tuthill},
title = {Pure numerical Boolean syllogisms.},
journal = {Notre Dame J. Formal Logic},
volume = {8},
number = {3},
year = {1967},
pages = { 321-324},
language = {en},
url = {http://dml.mathdoc.fr/item/1094068846}
}
Hacker, Edward A.; Parry, William Tuthill. Pure numerical Boolean syllogisms.. Notre Dame J. Formal Logic, Tome 8 (1967) no. 3, pp. 321-324. http://gdmltest.u-ga.fr/item/1094068846/