@article{SF_1972__5_133950,
     author = {T.T. Bowman},
     title = {Generators of categories of compact irreducible semigroups.},
     journal = {Semigroup forum},
     pages = {331--339},
     publisher = {mathdoc},
     volume = {5},
     year = {1972},
     zbl = {0265.22006},
     url = {http://geodesic.mathdoc.fr/item/SF_1972__5_133950/}
}