@article{PSMIR_1975___S4_A17_0,
     author = {Michel, Pierre},
     title = {Minimal {Sets} {Generated} by a {Substitution} of {Non} {Constant} {Length}},
     journal = {Publications de l'Institut de recherche math\'ematiques de Rennes},
     eid = {17},
     pages = {1--4},
     publisher = {D\'epartement de Math\'ematiques et Informatique, Universit\'e de Rennes},
     number = {S4},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PSMIR_1975___S4_A17_0/}
}