BRENNER, Philip. The Cauchy Problem for Symmetric Hyperbolic Systems in Lp. Mathematica Scandinavica, Berkeley, CA, United States, v. 19, p. 27–37, 1966. DOI: 10.7146/math.scand.a-10793. Disponível em: https://journals.msp.org/mscand/article/view/2548. Acesso em: 25 jul. 2026.