@article{SF_1985__31_134742,
     author = {E.G. Manes and D.B. Benson},
     title = {The inverse semigroup of a sumordered semiring.},
     journal = {Semigroup forum},
     pages = {129--152},
     year = {1985},
     volume = {31},
     zbl = {0549.06014},
     url = {http://geodesic.mathdoc.fr/item/SF_1985__31_134742/}
}