@article{1093957978,
author = {Wisdom, William A.},
title = {Possibility-elimination in natural deduction.},
journal = {Notre Dame J. Formal Logic},
volume = {5},
number = {1},
year = {1964},
pages = { 295-298},
language = {en},
url = {http://dml.mathdoc.fr/item/1093957978}
}
Wisdom, William A. Possibility-elimination in natural deduction.. Notre Dame J. Formal Logic, Tome 5 (1964) no. 1, pp. 295-298. http://gdmltest.u-ga.fr/item/1093957978/