@article{120154,
author = {Ji\v r\'\i\ Rach\r unek},
title = {Modal operators on ordered sets},
journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
volume = {24},
year = {1985},
pages = {9-14},
zbl = {0621.06003},
mrnumber = {879015},
language = {en},
url = {http://dml.mathdoc.fr/item/120154}
}
Rachůnek, Jiří. Modal operators on ordered sets. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 24 (1985) pp. 9-14. http://gdmltest.u-ga.fr/item/120154/
Modal operators on Heyting algebras, Algebra Univ. 12 (1981), 5-29. (1981) | MR 0608645 | Zbl 0459.06005
Translations des ensembles ordonnés, Math. Slovaca 31 (1981), 337-340 (1981) | MR 0637961 | Zbl 0472.06002