@article{GDZPPN001253549,
title = {Brandt groupiods and semigroups.},
journal = {Semigroup forum},
volume = {18},
year = {1979},
pages = {307-312},
url = {http://dml.mathdoc.fr/item/GDZPPN001253549}
}
Banaschewski, B. Brandt groupiods and semigroups.. Semigroup forum, Tome 18 (1979) pp. 307-312. http://gdmltest.u-ga.fr/item/GDZPPN001253549/