- Olga Karpova, Arseny M. Shur. Words Separation and Positive Identities in Symmetric Groups. Journal of Automata, Languages and Combinatorics, 26(1-2):67-89, 2021.
- Chiara Bindi, Marco Pellegrini, Giuseppe Pirillo. Some Results about Maximal Primitive Sets. Journal of Automata, Languages and Combinatorics, 26(1-2):7-15, 2021.
- David Callan, Toufik Mansour, José L. Ramírez. Statistics on Bargraphs of Catalan Words. Journal of Automata, Languages and Combinatorics, 26(3-4):177-196, 2021.
- Szilárd Zsolt Fazekas. Preface. Journal of Automata, Languages and Combinatorics, 26(1-2):3-5, 2021.
- Kenichi Morita. Constructing Reversible Turing Machines in a Reversible and Conservative Elementary Triangular Cellular Automaton. Journal of Automata, Languages and Combinatorics, 26(1-2):125-144, 2021.
- Sigrid Ewert, Joy Idahosa. Ogden's Lemma for Subclasses of Random Context Galleries. Journal of Automata, Languages and Combinatorics, 26(3-4):197-220, 2021.
- Sabine Broda, Eva Maia, Nelma Moreira, Rogério Reis. The Prefix Automaton. Journal of Automata, Languages and Combinatorics, 26(1-2):17-53, 2021.
- Stoyan Mihov, Klaus U. Schulz. F-Transducers for Contextual Text Rewriting. Journal of Automata, Languages and Combinatorics, 26(3-4):281-332, 2021.
- Lukas Fleischer, Jeffrey O. Shallit. Automata, Palindromes, and Reversed Subwords. Journal of Automata, Languages and Combinatorics, 26(3-4):221-253, 2021.
- Victor Mitrana, Andrei Paun, Mihaela Paun, José Ángel Sánchez Martín. Non-preserving Accepting Splicing Systems. Journal of Automata, Languages and Combinatorics, 26(1-2):109-124, 2021.