@article{GDZPPN001257684,
title = {Perfect semilattices.},
journal = {Semigroup forum},
volume = {31},
year = {1985},
pages = {23-30},
language = {en},
url = {http://dml.mathdoc.fr/item/GDZPPN001257684}
}
Hansoul, G.; Varlet, J. Perfect semilattices.. Semigroup forum, Tome 31 (1985) pp. 23-30. http://gdmltest.u-ga.fr/item/GDZPPN001257684/