SARKAR, A.; SIL, A.; PAUL, A. K. Some characterizations of three-dimensional trans-Sasakian manifolds admitting η- Ricci solitons and trans-Sasakian manifolds as Kagan subprojective space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 3, p. 427–432, 2020. DOI: 10.37863/umzh.v72i3.6047. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6047. Acesso em: 5 dec. 2025.