@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/