EKMEKCI, F. N.; TUĞ, G. Notes on the lightlike hypersurfaces along spacelike submanifolds. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 7, p. 968–975, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1490. Acesso em: 5 dec. 2025.