ALEKSEEVSKY, Dmitri V.; GANJI, Masoud; SCHMALZ, Gerd; SPIRO, Andrea. The Levi-Civita connections of Lorentzian manifolds with prescribed optical geometries. CUBO, A Mathematical Journal, [S. l.], v. 26, n. 2, p. 239–258, 2024. DOI: 10.56754/0719-0646.2602.239. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/3734. Acesso em: 12 oct. 2025.