Cellular automata and powers of p∕q. - Jarkko Kari; Johan Kopra (RAIRO Theor. Informatics Appl., 2017)

Glider Automorphisms on Some Shifts of Finite Type and a Finitary Ryan's Theorem. - Johan Kopra (Automata, 2018)

The Lyapunov Exponents of Reversible Cellular Automata Are Uncomputable. - Johan Kopra (UCNC, 2019)

Dynamics of Cellular Automata on Beta-Shifts and Direct Topological Factorizations. - Johan Kopra (DLT, 2020)

Glider automorphisms and a finitary Ryan's theorem for transitive subshifts of finite type. - Johan Kopra (Nat. Comput., 2020)

Sofically presented dynamical systems. - Johan Kopra; Ville Salo (CoRR, 2021)

On the Interplay of Direct Topological Factorizations and Cellular Automata Dynamics on Beta-Shifts. - Johan Kopra (Int. J. Found. Comput. Sci., 2021)

On computing the Lyapunov exponents of reversible cellular automata. - Johan Kopra (Nat. Comput., 2021)

On the trace subshifts of fractional multiplication automata. - Johan Kopra (Theor. Comput. Sci., 2021)

Rapid left expansivity, a commonality between Wolfram's Rule 30 and powers of p/q. - Johan Kopra (Theor. Comput. Sci., 2023)