@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/