ANDERSON, Arlen; CHOQUET-BRUCHAT, Yvonne; YORK JR., James W. Einstein-Bianchi hyperbolic system for general relativity. Topological Methods in Nonlinear Analysis, [S. l.], v. 10, n. 2, p. 353–373, 1997. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1997.037. Acesso em: 8 jul. 2025.