@book(Crochemore02,
 author       = "Maxime Crochemore and Wojciech Rytter",
 year         = "2002",
 title        = "Jewels of Stringology",
 publisher    = "World Scientific Publishing Company, Incorporated",
 doi          = "10.1142/4838",
)
@article(Curie02,
 author       = "James D. Currie and D. Sean Fitzpatrick",
 year         = "2002",
 title        = "Circular words avoiding patterns",
 journal      = "Proceedings of the 6th International Conference on Developments in Language Theory. LNCS 2450.",
 pages        = "319--325",
 doi          = "10.1007/3-540-45005-X\_28",
)
@article(DHN06,
 author       = "Volker Diekert and Tero Harju and Dirk Nowotka",
 year         = "2006",
 title        = "Factorizations of cyclic words",
 journal      = "Workshop on Words and Automata at CSR",
 volume       = "7",
)
@article(FazNagy08,
 author       = "Szil\'{a}rd Zsolt Fazekas and Benedek Nagy",
 year         = "2008",
 title        = "Scattered Subword Complexity of Non-primitive Words",
 journal      = "J. Autom. Lang. Comb.",
 volume       = "13",
 number       = "3",
 pages        = "233--247",
)
@article(FineWilf65,
 author       = "Nathan J. Fine and Herbert S. Wilf",
 year         = "1965",
 title        = "Uniqueness theorems for periodic functions",
 journal      = "Proceedings of the American Mathematical Society",
 volume       = "16",
 pages        = "109--114",
 doi          = "10.1090/S0002-9939-1965-0174934-9",
)
@article(Fitzpatrick04,
 author       = "D. Sean Fitzpatrick",
 year         = "2005",
 title        = "There are binary cube-free circular words of length $n$ contained within the Thue-Morse word for all positive integers $n$",
 journal      = "Ars Combinatorica",
 volume       = "74",
)
@article(Hegedus13,
 author       = "L\'{a}szl\'{o} Heged\"{u}s and Benedek Nagy",
 year         = "2013",
 title        = "Periodicity of circular words",
 journal      = "Local Proceedings of WORDS 2013, TUCS Lecture Notes",
 volume       = "20",
 pages        = "45--56",
)
@book(Lothaire83,
 author       = "M. Lothaire",
 year         = "1983",
 title        = "Combinatorics on words",
 publisher    = "Addison-Wesley",
)
@book(Lothaire02,
 author       = "M. Lothaire",
 year         = "2002",
 title        = "Algebraic Combinatorics on Words",
 series       = "Encyclopedia of Mathematics and its Applications",
 volume       = "90",
 publisher    = "Cambridge University Press",
 doi          = "10.1017/CBO9781107326019",
)
@book(Lothaire05,
 author       = "M. Lothaire",
 year         = "2005",
 title        = "Applied Combinatorics on Words",
 series       = "Encyclopedia of Mathematics and its Applications",
 volume       = "105",
 publisher    = "Cambridge University Press",
 doi          = "10.1017/CBO9781107341005",
)
@article(deLucaMignosi94,
 author       = "Aldo de Luca and Filippo Mignosi",
 year         = "1994",
 title        = "Some combinatorial properties of Sturmian words",
 journal      = "Theoretical Computer Science",
 volume       = "136",
 number       = "2",
 pages        = "361--385",
 doi          = "10.1016/0304-3975(94)00035-H",
)
@article(LyndonSchutzenberger62,
 author       = "Roger C. Lyndon and Marcel-Paul Sch\"{u}tzenberger",
 year         = "1962",
 title        = "The equation $a^M=b^Nc^P$ in a free group",
 journal      = "Michigan Math. J.",
 volume       = "9",
 number       = "4",
 pages        = "289--298",
 doi          = "10.1307/mmj/1028998766",
)
@book(Nowotka04,
 author       = "Dirk Nowotka",
 year         = "2004",
 title        = "Periodicity and unbordered factors of words",
 publisher    = "TUCS Dissertations No. 50",
)
@article(RittaudVivier11,
 author       = "Beno\^{i}t Rittaud and Laurent Vivier",
 year         = "2011",
 title        = "Circular words and applications",
 journal      = "Proceedings of Words 2011, Electronic Proceedings in Theoretical Computer Science",
 volume       = "63",
 pages        = "31--36",
 doi          = "10.4204/EPTCS.63.6",
)
@article(RittaudVivier12,
 author       = "Beno\^{i}t Rittaud and Laurent Vivier",
 year         = "2012",
 title        = "Circular words and three applications: factors of the Fibonacci word, $\mathcal F$-adic numbers, and the sequence 1, 5, 16, 45, 121, 320,\ldots ",
 journal      = "Funct. Approx. Comment. Math.",
 volume       = "47",
 number       = "2",
 pages        = "207--231",
 doi          = "10.7169/facm/2012.47.2.6",
)
@book(seebold85,
 author       = "Patrice S\'{e}\'{e}bold",
 year         = "1985",
 title        = "Propri\'{e}t\'{e}s combinatoires des mots infinis engendr\'{e}s par certains morphismes",
 publisher    = "Th\`{e}se de doctorat, Universit\'{e} P. et M. Curie, Institut de Programmation",
)
@article(Shur10,
 author       = "Arseny M. Shur",
 year         = "2010",
 title        = "On ternary square-free circular words",
 journal      = "The Electronic Journal of Combinatorics",
 volume       = "17",
)
@book(Smyth03,
 author       = "William Smyth",
 year         = "2003",
 title        = "Computing patterns in strings",
 publisher    = "Addison-Wesley",
)
@article(Thue06,
 author       = "Axel Thue",
 year         = "1906",
 title        = "\"{U}ber unendliche Zeichenreihen",
 journal      = "Kra. Vidensk. Selsk. Skrifter, I. Mat. Nat. Kl.",
 volume       = "7",
 pages        = "1--22",
)
@article(Thue12,
 author       = "Axel Thue",
 year         = "1912",
 title        = "\"{U}ber die gegenseitige Lage gleicher Teile gewisser Zeichenreihen",
 journal      = "Kra. Vidensk. Selsk. Skrifter, I. Mat. Nat. Kl.",
 volume       = "46",
 pages        = "1--67",
)