@article{1093882815, author = {Hung, Hin Chung}, title = {Entailment and proof.}, journal = {Notre Dame J. Formal Logic}, volume = {20}, number = {1}, year = {1979}, pages = { 921-933}, language = {en}, url = {http://dml.mathdoc.fr/item/1093882815} }
Hung, Hin Chung. Entailment and proof.. Notre Dame J. Formal Logic, Tome 20 (1979) no. 1, pp. 921-933. http://gdmltest.u-ga.fr/item/1093882815/