@article{bwmeta1.element.bwnjournal-article-bcpv9i1p289bwm,
author = {Iturrioz, Luisa},
title = {Modal operators on symmetrical Heyting algebras},
journal = {Banach Center Publications},
volume = {7},
year = {1982},
pages = {289-303},
zbl = {0508.06012},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-bcpv9i1p289bwm}
}
Iturrioz, Luisa. Modal operators on symmetrical Heyting algebras. Banach Center Publications, Tome 7 (1982) pp. 289-303. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-bcpv9i1p289bwm/