@article{MZ_1968__106_171043,
     author = {K.R. Pearson},
     title = {Compact {Semirings} which are {Multiplicatively} {Groups} or {Groups} with {Zero.}},
     journal = {Mathematische Zeitschrift},
     pages = {388--394},
     publisher = {mathdoc},
     volume = {106},
     year = {1968},
     zbl = {0165.34901},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__106_171043/}
}