@article{1093891302,
author = {Wasserman, Howard C.},
title = {Admissible rules, derivable rules, and extendible logistic systems.},
journal = {Notre Dame J. Formal Logic},
volume = {15},
number = {1},
year = {1974},
pages = { 265-278},
language = {en},
url = {http://dml.mathdoc.fr/item/1093891302}
}
Wasserman, Howard C. Admissible rules, derivable rules, and extendible logistic systems.. Notre Dame J. Formal Logic, Tome 15 (1974) no. 1, pp. 265-278. http://gdmltest.u-ga.fr/item/1093891302/