ADEDEMI, R. E.; ATINDOGBE, C. C.; HOUNNONKPE, R. A. $\widetilde{L_r}-$finite type null hypersurfaces in generalized Robertson-Walker spacetimes. Calculation, [S. l.], v. 2, n. 1, p. 12–25, 2026. Disponível em: https://simadp.com/calculation/article/view/calcv2i1-2. Acesso em: 2 aug. 2026.