@article{1093635084,
author = {Johnson, Fred},
title = {Models for modal syllogisms.},
journal = {Notre Dame J. Formal Logic},
volume = {30},
number = {2},
year = {1989},
pages = { 271-284},
language = {en},
url = {http://dml.mathdoc.fr/item/1093635084}
}
Johnson, Fred. Models for modal syllogisms.. Notre Dame J. Formal Logic, Tome 30 (1989) no. 2, pp. 271-284. http://gdmltest.u-ga.fr/item/1093635084/