@article{1094068851,
author = {Cresswell, M. J.},
title = {Alternative completeness theorems for modal systems.},
journal = {Notre Dame J. Formal Logic},
volume = {8},
number = {3},
year = {1967},
pages = { 339-345},
language = {en},
url = {http://dml.mathdoc.fr/item/1094068851}
}
Cresswell, M. J. Alternative completeness theorems for modal systems.. Notre Dame J. Formal Logic, Tome 8 (1967) no. 3, pp. 339-345. http://gdmltest.u-ga.fr/item/1094068851/