@article{GDZPPN001247328,
title = {The translational hull in semigroups and rings.},
journal = {Semigroup forum},
volume = {1},
year = {1970},
pages = {283-360},
zbl = {0209.04902},
url = {http://dml.mathdoc.fr/item/GDZPPN001247328}
}
Petrich, M. The translational hull in semigroups and rings.. Semigroup forum, Tome 1 (1970) pp. 283-360. http://gdmltest.u-ga.fr/item/GDZPPN001247328/