BRENNER, Philip. The Cauchy Problem for Symmetric Hyperbolic Systems in Lp. MATHEMATICA SCANDINAVICA, [S. l.], v. 19, p. 27–37, 1966. DOI: 10.7146/math.scand.a-10793. Disponível em: https://tidsskrift.dk/math/article/view/10793. Acesso em: 13 aug. 2026.