@article{MOMA_1973__77_177657,
     author = {George Szeto},
     title = {The {Sub-Semi-Groups} {Excluding} {Zero} of a {Near-Ring.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {357--362},
     publisher = {mathdoc},
     volume = {77},
     year = {1973},
     zbl = {0277.16024},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1973__77_177657/}
}