[1] A. Achache:
Galois connection of a fuzzy subset. Fuzzy Sets and Systems 8 (1982), 215 - 218.
MR 0666633
[3] A. Achache, A.A.L. Sangalli:
Préordres, résiduation et espaces de fermeture. Appl. Discrete Math, (to appear).
MR 1284745 |
Zbl 0802.06004
[4] T. S. BIyth, M.F. Janowitz:
Residuation Theory. Pergamon Press, Oxford 1972.
MR 0396359