@article{MAN_1977__229_163002,
     author = {Stephen T.L. Choy},
     title = {Hewitt-Zuckermann {Semigroups} in the {Structure} {Semigroups} of {Measure} {Algebras.}},
     journal = {Mathematische Annalen},
     pages = {59--64},
     publisher = {mathdoc},
     volume = {229},
     year = {1977},
     zbl = {0337.43003},
     url = {http://geodesic.mathdoc.fr/item/MAN_1977__229_163002/}
}