DEVGAN, A.; NAGAICH, R. K. Totally Contact Umbilical Radical Transversal Lightlike Submanifolds Of An Almost Contact Manifold With B-Metric. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 13, n. 4, p. 7286-7294, 2017. DOI: 10.24297/jam.v13i4.6234. Disponível em: https://rajpub.com/index.php/jam/article/view/6234. Acesso em: 31 oct. 2020.