@article{SLC_1998-1999_42_a12,
     author = {Arturo Carpi and Aldo de Luca},
     title = {Words and {Repeated} {Factors}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {42},
     year = {1998-1999},
     url = {http://geodesic.mathdoc.fr/item/SLC_1998-1999_42_a12/}
}