1. A. Ya. Belov, V. V. Borisenko, and V. N. Latyshev, “Monomial algebras,” in Itogi Nauki i Tekhniki. Ser. Sovrem. Mat. Pril. Temat. Obz., Contemporary Mathematics and Its Applications. Thematic Surveys, Vol. 26: Algebra 4 (VINITI, Moscow, 2002), pp. 35–214 [J. Math. Sci. (NewYork) 87 (3), 3463–3575 (1997)].
2. M. Lothaire, “Combinatorics on Words,” in Encyclopedia of Math. Appl. (Addison-Wesley, Reading, MA, 1983), Vol. 17.
3. G. M. Bergman, A Note on Growth Functions of Algebras and Semigroups, Research Note (University of California, Berkeley, CA, 1978).
4. J. Berstel and P. Séébold, “Sturmian words,” in Algebraic Combinatorics onWords, Encyclopedia ofMath. Appl. (Cambridge Univ. Press, Cambridge, 2002), Vol. 90.
5. A. Ya. Belov and A. L. Chernyat’ev, “Words with low complexity and interval exchange transformations,” UspekhiMat. Nauk 63 (1 (379)), 159–160 (2008) [RussianMath. Surveys 63 (1), 158–160 (2008)].