@article{05506417,
title = {Galois-type connections and closure operations on preordered sets.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {78},
year = {2009},
pages = {1-21},
zbl = {1199.06005},
language = {en},
url = {http://dml.mathdoc.fr/item/05506417}
}
Száz, Árpád. Galois-type connections and closure operations on preordered sets.. Acta Mathematica Universitatis Comenianae. New Series, Tome 78 (2009) pp. 1-21. http://gdmltest.u-ga.fr/item/05506417/