@article{1093957879,
author = {Canty, John Thomas},
title = {A natural deduction system for modal logic.},
journal = {Notre Dame J. Formal Logic},
volume = {5},
number = {1},
year = {1964},
pages = { 199-210},
language = {en},
url = {http://dml.mathdoc.fr/item/1093957879}
}
Canty, John Thomas. A natural deduction system for modal logic.. Notre Dame J. Formal Logic, Tome 5 (1964) no. 1, pp. 199-210. http://gdmltest.u-ga.fr/item/1093957879/