@article{GDZPPN001250191,
title = {Problems 44 and 39 on compact semilattices.},
journal = {Semigroup forum},
volume = {7},
year = {1974},
pages = {179-180},
zbl = {0285.22006},
url = {http://dml.mathdoc.fr/item/GDZPPN001250191}
}
Lau, A.Y.W. Problems 44 and 39 on compact semilattices.. Semigroup forum, Tome 7 (1974) pp. 179-180. http://gdmltest.u-ga.fr/item/GDZPPN001250191/