ÇEVIK, A. S. One dimension higher of the word problem. MATHEMATICA SCANDINAVICA, [S. l.], v. 95, n. 2, p. 161–170, 2004. DOI: 10.7146/math.scand.a-14454. Disponível em: https://www.mscand.dk/article/view/14454. Acesso em: 23 nov. 2024.