In this paper we define products of one-dimensional Number Conserving Cellular Automata (NCCA) and show that surjective NCCA with 2 blocks (i.e radius 1/2) can always be represented as products of shifts and identites. In particular, this shows that surjective 2-block NCCA are injective.
Barbara Wolnik;Maciej Dziemiańczuk;Adam Dzedzej;Bernard De Baets, 2021, Reversibility of number-conserving 1D cellular automata: Unlocking insights into the dynamics for larger state sets, Physica D Nonlinear Phenomena, 429, pp. 133075, 10.1016/j.physd.2021.133075.
Bruno Martin;R. Saito;Katsunobu Imai, Emergence, complexity and computation, On Radius 1 Nontrivial Reversible and Number-Conserving Cellular Automata, pp. 269-277, 2018, 10.1007/978-3-319-73216-9_12.