1. Démonstration de l'existence des suites asymétriques infinies;Arshon;Mat. Sb.,1937
2. Counting overlap-free binary words;Cassaigne,1993
3. Sharp characterizations of square-free morphisms;Crochemore;Theoret. Comput. Sci.,1982
4. Binary sequences which contain no BBb;Fife;Trans. Amer. Math. Soc.,1980
5. A characterization of the Morse minimal set;Gottschalk;Proc. Amer. Math. Soc.,1964