@article{10_4064_aa122_4_1,
     author = {Val\'erie Berth\'e and Charles Holton and Luca Q. Zamboni},
     title = {Initial powers of {Sturmian} sequences},
     journal = {Acta Arithmetica},
     pages = {315--347},
     publisher = {mathdoc},
     volume = {122},
     number = {4},
     year = {2006},
     doi = {10.4064/aa122-4-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa122-4-1/}
}