COLIN DE VERDIÈRE, Éric; KALUŽA, Vojtěch; PATÁK, Pavel; PATÁKOVÁ, Zuzana; TANCER, Martin. A Direct Proof of the Strong Hanani-Tutte Theorem on the Projective Plane. Journal of Graph Algorithms and Applications, [S. l.], v. 21, n. 5, p. 939–981, 2017. DOI: 10.7155/jgaa.00445. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper445. Acesso em: 30 jun. 2024.