@article{SLC_1991_27_a3,
     author = {G\'erard Duchamp},
     title = {\'Elimination de g\'en\'erateurs dans les structures partiellement commutatives},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {27},
     year = {1991},
     url = {http://geodesic.mathdoc.fr/item/SLC_1991_27_a3/}
}