Chapters 11 & 12 of the free textbook "Introduction to the Modeling and Analysis of Complex Systems" [1] are on cellular automata. The "Complex Systems" journal has many papers on CA. [2] (I've just finished a project where we implemented a random number generator using a cellular automaton, might be nice to see. [3])
[1]: http://textbooks.opensuny.org/introduction-to-the-modeling-a...
[2]: http://www.complex-systems.com/archives.html
[3]: https://sunsistemo.github.io/mozzacella-automato-salad