@article{SLC_1982_06_a9,
     author = {Jean-\'Eric Pin},
     title = {Variet\'es de langages et combinatoire},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1982},
     volume = {06},
     url = {http://geodesic.mathdoc.fr/item/SLC_1982_06_a9/}
}