@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/