@article{03925787,
title = {The largest proper congruence on S(X).},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {7},
year = {1984},
pages = {663-666},
doi = {10.1155/S0161171284000697},
zbl = {0578.54025},
language = {en},
url = {http://dml.mathdoc.fr/item/03925787}
}
Magill, K.D.jun. The largest proper congruence on S(X).. International Journal of Mathematics and Mathematical Sciences, Tome 7 (1984) pp. 663-666. doi : 10.1155/S0161171284000697. http://gdmltest.u-ga.fr/item/03925787/