@article{1093888117,
author = {Slaght, Ralph L.},
title = {Modal tree constructions.},
journal = {Notre Dame J. Formal Logic},
volume = {18},
number = {1},
year = {1977},
pages = { 517-526},
language = {en},
url = {http://dml.mathdoc.fr/item/1093888117}
}
Slaght, Ralph L. Modal tree constructions.. Notre Dame J. Formal Logic, Tome 18 (1977) no. 1, pp. 517-526. http://gdmltest.u-ga.fr/item/1093888117/