KLYACHIN, V.; MIKLYUKOV, V. Geometric structure of tubes and bands of zero mean curvature in Minkowski space. Annales Fennici Mathematici, [S. l.], v. 28, n. 2, p. 239–270, 2003. Disponível em: https://afm.journal.fi/article/view/135076. Acesso em: 17 touko. 2024.