Geodesic
Some Recent Results on Squarefree Words
Publications du Département de mathématiques (Lyon), Compte rendu des journées infinitistes, no. 2B (1985), pp. 21-36.

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Berstel, Jean. Some Recent Results on Squarefree Words. Publications du Département de mathématiques (Lyon), Compte rendu des journées infinitistes, no. 2B (1985), pp. 21-36. http://geodesic.mathdoc.fr/item/PDML_1985___2B_21_0/

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