@article{SF_1979__17_134324,
     author = {A. Batbedat},
     title = {Le produit demi-direct pour les demi-groupes inverses.},
     journal = {Semigroup forum},
     pages = {283--306},
     publisher = {mathdoc},
     volume = {17},
     year = {1979},
     zbl = {0462.20051},
     url = {http://geodesic.mathdoc.fr/item/SF_1979__17_134324/}
}