ITO, Noboru; TAKIMURA, Yusuke. Any Nontrivial Knot Projection with No Triple Chords Has a Monogon or a Bigon. Topology Proceedings, [S. l.], v. 60, p. 31–44, 2021. Disponível em: https://www.topologyproceedings.org/index.php/tp/article/view/59. Acesso em: 30 jun. 2026.