@article{GDZPPN000363162, title = {Periodic Orbits for Additive Cellular Automata.}, journal = {Discrete \& computational geometry}, volume = {1}, year = {1986}, pages = {277-288}, zbl = {0596.68050}, url = {http://dml.mathdoc.fr/item/GDZPPN000363162} }
Cordovil, R.; Dilao, Rui; Costa, Ana Noronha da. Periodic Orbits for Additive Cellular Automata.. Discrete & computational geometry, Tome 1 (1986) pp. 277-288. http://gdmltest.u-ga.fr/item/GDZPPN000363162/