@article{GDZPPN001251155,
title = {The bicommutator of the injective hull of a nonsingular semigroup.},
journal = {Semigroup forum},
volume = {12},
year = {1976},
pages = {71-77},
zbl = {0322.20033},
url = {http://dml.mathdoc.fr/item/GDZPPN001251155}
}
Lopez, A. M.; Luedeman, J.K. The bicommutator of the injective hull of a nonsingular semigroup.. Semigroup forum, Tome 12 (1976) pp. 71-77. http://gdmltest.u-ga.fr/item/GDZPPN001251155/