@article{SF_1974__7_134016,
     author = {John Isbell},
     title = {Notes on semigroup dominions.},
     journal = {Semigroup forum},
     pages = {364--368},
     publisher = {mathdoc},
     volume = {7},
     year = {1974},
     zbl = {0276.20055},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__7_134016/}
}