@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/