@article{SF_1974__6_133967,
     author = {N. Bouleau},
     title = {Classes de semigroups immersibles dans des groupes.},
     journal = {Semigroup forum},
     pages = {100--112},
     publisher = {mathdoc},
     volume = {6},
     year = {1974},
     zbl = {0269.20054},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133967/}
}