@article{SF_1977__14_186369,
     author = {H.J. Weinert and R.D. Griepentrog},
     title = {Embedding semigroups by translational hulls.},
     journal = {Semigroup forum},
     pages = {235--246},
     publisher = {mathdoc},
     volume = {14},
     year = {1977},
     zbl = {0348.16014},
     url = {http://geodesic.mathdoc.fr/item/SF_1977__14_186369/}
}