24548 Jean Berstel/Aaron Lauve/Christophe Reutenauer/Franco Saliola: Combinatorics
on words. AMS 2009, 150p. Eur 40.

11602 Christian Choffrut/Juhani Karhuma''ki: Combinatorics of words.
Turku Centre CS TR 1996/77, 126p.

11601 Larry Cummings/W. Smyth: Weak repetitions in strings.
Internet 1994, 18p.

11578 R. Entringer/D. Jackson/J. Schatz: On nonrepetitive sequences.
J. Comb. Theory A 16 (1974), 159-164.

15004 Mathieu Raffinot: On maximal repeats in strings.
Inf. Processing Letters 80 (2001), 165-169.

15015 W. Smyth: Repetitive perhaps, but certainly not boring.
Theor. Comp. Sci. 249 (2000), 343-355.

24617 Ming-wei Wang: Periodicity and repetition in combinatorics on words.
PhD thesis Univ. Waterloo 2004, 135p.