@article{SF_1972__4_133888,
     author = {J.E. Ault},
     title = {Translational hull of an inverse semigroup.},
     journal = {Semigroup forum},
     pages = {165--168},
     publisher = {mathdoc},
     volume = {4},
     year = {1972},
     zbl = {0257.20052},
     url = {http://geodesic.mathdoc.fr/item/SF_1972__4_133888/}
}