@article{SF_1974__6_133994,
     author = {J. Rompke},
     title = {Partially ordered, primitive regular semigroups.},
     journal = {Semigroup forum},
     pages = {352--359},
     publisher = {mathdoc},
     volume = {6},
     year = {1974},
     zbl = {0268.06010},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133994/}
}