YASAR, Erol; CÖKEN, A. Ceylan; YÜCESAN, Ahmet. Lightlike hypersurfaces in semi-Riemannian manifold with semi-symmetric non-metric connection. Mathematica Scandinavica, Berkeley, CA, United States, v. 102, n. 2, p. 253–264, 2008. DOI: 10.7146/math.scand.a-15061. Disponível em: https://journals.msp.org/mscand/article/view/636. Acesso em: 24 jul. 2026.