@article(BerstelPocchiola1993,
 author       = "Jean Berstel and Michel Pocchiola",
 year         = "1993",
 title        = "A geometric proof of the enumeration formula for {S}turmian words",
 journal      = "Internat. J. Algebra Comput.",
 volume       = "3",
 number       = "3",
 pages        = "349--355",
 doi          = "10.1142/S0218196793000238",
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@article(CassaigneHubertTroubetzkoy2002,
 author       = "J. Cassaigne and P. Hubert and S. Troubetzkoy",
 year         = "2002",
 title        = "Complexity and growth for polygonal billiards",
 journal      = "Ann. Inst. Fourier (Grenoble)",
 volume       = "52",
 number       = "3",
 pages        = "835--847",
 url          = "http://aif.cedram.org/item?id=AIF_2002__52_3_835_0",
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@article(Cassaigne1997,
 author       = "Julien Cassaigne",
 year         = "1997",
 title        = "Complexit\'e et facteurs sp\'eciaux",
 journal      = "Bull. Belg. Math. Soc. Simon Stevin",
 volume       = "4",
 number       = "1",
 pages        = "67--88",
 url          = "http://projecteuclid.org/getRecord?id=euclid.bbms/1105730624",
 note         = "Journ{\'e}es Montoises (Mons, 1994)",
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@article(Lipatov1982,
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@book(Lothaire2002,
 author       = "M. Lothaire",
 year         = "2002",
 title        = "Algebraic combinatorics on words",
 series       = "Encyclopedia of Mathematics and its Applications",
 volume       = "90",
 publisher    = "Cambridge University Press",
 address      = "Cambridge",
 note         = "Chapter 3, \emph {Sturmian Words} (by Jean Berstel and Patrice S\'e\'ebold)",
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@article(Mignosi1991,
 author       = "Filippo Mignosi",
 year         = "1991",
 title        = "On the number of factors of {S}turmian words",
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 volume       = "82",
 number       = "1, Algorithms Automat. Complexity Games",
 pages        = "71--84",
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@inproceedings(MonteilDGCI2011,
 author       = "Thierry Monteil",
 year         = "2011",
 title        = "Another Definition for Digital Tangents",
 booktitle    = "DGCI",
 series       = "Lecture Notes in Computer Science",
 volume       = "6607",
 pages        = "95--103",
 doi          = "10.1007/978-3-642-19867-0\_8",
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@book(PytheasFogg2002,
 author       = "N. Pytheas Fogg",
 year         = "2002",
 title        = "Substitutions in dynamics, arithmetics and combinatorics",
 series       = "Lecture Notes in Mathematics",
 volume       = "1794",
 publisher    = "Springer-Verlag",
 address      = "Berlin",
 doi          = "10.1007/b13861",
 note         = "Chapter 6, \emph {Sturmian Sequences} (by Pierre Arnoux)",
)