@article{JRAM_1992__424_153393,
     author = {David Solomon},
     title = {Canonical factorisations in multiplicative {Galois} structure.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {181--217},
     publisher = {mathdoc},
     volume = {424},
     year = {1992},
     zbl = {0734.11066},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1992__424_153393/}
}