DOKUZOVA, Iva. Four-dimensional Riemannian product manifolds with circulant structures. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 68, n. 2, p. 439–448, 2023. DOI: 10.24193/subbmath.2023.2.17. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/6012. Acesso em: 5 feb. 2025.