Terry Anderson Narad Rampersad Nicolae Santean Jeffrey Shallit Finite Automata, Palindromes, Powers, and Patterns. 52-63 2008 LATA http://dx.doi.org/10.1007/978-3-540-88282-4_7 conf/lata/2008 db/conf/lata/lata2008.html#AndersonRSS08