WEIER, J. Lorentzmetrik in der Algebra der komplexen 4-Matrizen. MATHEMATICA SCANDINAVICA, [S. l.], v. 14, p. 120–128, 1964. DOI: 10.7146/math.scand.a-10712. Disponível em: https://www.mscand.dk/article/view/10712. Acesso em: 2 may. 2024.