M. Bucci A. de Luca A. De Luca 2009 Rich and Periodic-Like Words V. Diekert D. Nowotka Developments in Language Theory, 13th International Conference, DLT 2009, Stuttgart, Germany, June 30–July 3, 2009, Proceedings Lecture Notes in Comput. Sci. 5583 Springer 145–155 10.1007/978-3-642-02737-6_11 A. Carpi A. de Luca 2001 Periodic-like words, periodicity and boxes Acta Informatica 37 597–618 10.1007/PL00013314 A. Carpi A. de Luca 2005 Central Sturmian Words: Recent Developments C. De Felice A. Restivo Developments in Language Theory, 9th International Conference, DLT 2005, Palermo, Italy, July 4-8, 2005, Proceedings Lecture Notes in Comput. Sci. 3572 Springer 36–56 10.1007/11505877_4 F. D'Alessandro 2002 A combinatorial problem on Trapezoidal words Theoret. Comput. Sci. 273 1-2 11–33 10.1016/S0304-3975(00)00431-X A. Glen J. Justin S. Widmer L. Q. Zamboni 2009 Palindromic richness European J. Combin. 30 510–531 10.1016/j.ejc.2008.04.006 M. Lothaire 2002 Algebraic Combinatorics on Words Encyclopedia of Mathematics and its Applications Cambridge Univ. Press
New York, NY, USA
 A. de Luca 1999 On the combinatorics of finite words Theoret. Comput. Sci. 218 13–39 10.1016/S0304-3975(98)00248-5 A. de Luca A. De Luca 2005 Palindromes in Sturmian Words C. De Felice A. Restivo Developments in Language Theory, 9th International Conference, DLT 2005, Palermo, Italy, July 4-8, 2005, Proceedings Lecture Notes in Comput. Sci. 3572 Springer 199–208 10.1007/11505877_18 A. de Luca A. De Luca 2006 Combinatorial properties of Sturmian palindromes Internat. J. Found. Comput. Sci. 17 3 557–573 10.1142/S0129054106003991 A. de Luca A. De Luca 2006 Some characterizations of finite Sturmian words Theoret. Comput. Sci. 356 118–125 10.1016/j.tcs.2006.01.036 A. de Luca A. Glen L. Q. Zamboni 2008 Rich, Sturmian, and Trapezoidal words Theoret. Comput. Sci. 407 569–573 10.1016/j.tcs.2008.06.009 A. de Luca F. Mignosi 1994 Some combinatorial properties of Sturmian words Theoret. Comput. Sci. 136 2 361–385 10.1016/0304-3975(94)00035-H F. Mignosi 1991 On the number of factors of Sturmian words Theoret. Comput. Sci. 82 71–84 10.1016/0304-3975(91)90172-X