@article{GDZPPN00126219X,
title = {Homomorphisms of implicative semigroups.},
journal = {Semigroup forum},
volume = {46},
year = {1993},
pages = {7-15},
zbl = {0776.06012},
url = {http://dml.mathdoc.fr/item/GDZPPN00126219X}
}
Shum, K.P.; Chan, M.W. Homomorphisms of implicative semigroups.. Semigroup forum, Tome 46 (1993) pp. 7-15. http://gdmltest.u-ga.fr/item/GDZPPN00126219X/