Schaeffer L, Shallit J. Closed, Palindromic, Rich, Privileged, Trapezoidal, and Balanced Words in Automatic Sequences. Electron. J. Combin. [Internet]. 2016Feb.5 [cited 2026Apr.10];23(1):#P1.25. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i1p25