@article{PPN362162808_0014+dmdlog13,
title = {Semilattices of groups with distributive congruence lattice.},
journal = {Semigroup forum},
volume = {14},
year = {1977},
pages = {81-92},
zbl = {0392.20041},
url = {http://dml.mathdoc.fr/item/PPN362162808_0014+dmdlog13}
}
Fountain, J. B.; Lockley, P. Semilattices of groups with distributive congruence lattice.. Semigroup forum, Tome 14 (1977) pp. 81-92. http://gdmltest.u-ga.fr/item/PPN362162808_0014+dmdlog13/