@article{SF_1993__46_1_135216,
     author = {L.B. Stephen},
     title = {Inverse monoids and rational subsets of related groups.},
     journal = {Semigroup forum},
     pages = {98--108},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {1993},
     zbl = {0807.20048},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__46_1_135216/}
}