TAMRAZOV, P. M. Moduli and extremal metrics on nonorientable and twisted Riemannian manifolds. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 10, p. 1388–1398, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4824. Acesso em: 5 dec. 2025.