@article{SF_1974__7_134015,
     author = {T.T. Bowman},
     title = {Construction functors for topological semigroups.},
     journal = {Semigroup forum},
     pages = {358--363},
     publisher = {mathdoc},
     volume = {7},
     year = {1974},
     zbl = {0275.22009},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__7_134015/}
}