THOMSEN, Klaus. On the embedding and diagonalization of matrices over $C(X)$. Mathematica Scandinavica, Berkeley, CA, United States, v. 60, p. 219–228, 1987. DOI: 10.7146/math.scand.a-12181. Disponível em: https://journals.msp.org/mscand/article/view/1448. Acesso em: 25 jul. 2026.