@article{1093894011,
author = {Soboci\'nski, Boles\l aw},
title = {Note on Zeman's modal system $S4.04$.},
journal = {Notre Dame J. Formal Logic},
volume = {11},
number = {1},
year = {1970},
pages = { 383-384},
language = {en},
url = {http://dml.mathdoc.fr/item/1093894011}
}
Sobociński, Bolesław. Note on Zeman's modal system $S4.04$.. Notre Dame J. Formal Logic, Tome 11 (1970) no. 1, pp. 383-384. http://gdmltest.u-ga.fr/item/1093894011/