GROVE, K.; VERDIANI, L.; WILKING, B.; ZILLER, W. Non-negative curvature obstructions in cohomogeneity one and the Kervaire spheres . ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 5, n. 2, p. 159-170, 2009. DOI: 10.2422/2036-2145.2006.2.02. Disponível em: https://journals.sns.it/index.php/annaliscienze/article/view/95. Acesso em: 20 feb. 2026.