@article{1183740562,
author = {Maddux, Roger},
title = {The Equational Theory of $CA\_3$ is Undecidable},
journal = {J. Symbolic Logic},
volume = {45},
number = {1},
year = {1980},
pages = { 311-316},
language = {en},
url = {http://dml.mathdoc.fr/item/1183740562}
}
Maddux, Roger. The Equational Theory of $CA_3$ is Undecidable. J. Symbolic Logic, Tome 45 (1980) no. 1, pp. 311-316. http://gdmltest.u-ga.fr/item/1183740562/