@article{1093894719,
author = {Parks, R. Zane and Chidgey, John R.},
title = {Necessity and ticket entailment.},
journal = {Notre Dame J. Formal Logic},
volume = {13},
number = {3},
year = {1972},
pages = { 224-226},
language = {en},
url = {http://dml.mathdoc.fr/item/1093894719}
}
Parks, R. Zane; Chidgey, John R. Necessity and ticket entailment.. Notre Dame J. Formal Logic, Tome 13 (1972) no. 3, pp. 224-226. http://gdmltest.u-ga.fr/item/1093894719/