@article{1183735107, author = {Smullyan, Raymond M.}, title = {Analytic Natural Deduction}, journal = {J. Symbolic Logic}, volume = {30}, number = {1}, year = {1965}, pages = { 123-139}, language = {en}, url = {http://dml.mathdoc.fr/item/1183735107} }
Smullyan, Raymond M. Analytic Natural Deduction. J. Symbolic Logic, Tome 30 (1965) no. 1, pp. 123-139. http://gdmltest.u-ga.fr/item/1183735107/