@article{1093635085,
author = {Schumm, George F.},
title = {Some compactness results for modal logic.},
journal = {Notre Dame J. Formal Logic},
volume = {30},
number = {2},
year = {1989},
pages = { 285-290},
language = {en},
url = {http://dml.mathdoc.fr/item/1093635085}
}
Schumm, George F. Some compactness results for modal logic.. Notre Dame J. Formal Logic, Tome 30 (1989) no. 2, pp. 285-290. http://gdmltest.u-ga.fr/item/1093635085/