@article{1093891016,
author = {Lehman, Anne},
title = {Two sets of perfect syllogisms.},
journal = {Notre Dame J. Formal Logic},
volume = {14},
number = {1},
year = {1973},
pages = { 425-429},
language = {en},
url = {http://dml.mathdoc.fr/item/1093891016}
}
Lehman, Anne. Two sets of perfect syllogisms.. Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, pp. 425-429. http://gdmltest.u-ga.fr/item/1093891016/