OKHRIMENKO, S. A.; TAMRAZOV, P. M. Pairwise products of moduli of families of curves on a Riemannian Möbius strip. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 1, p. 110–116, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4587. Acesso em: 5 dec. 2025.