IVANOV, G. M. Convex hull deviation and contractibility. Topological Methods in Nonlinear Analysis, [S. l.], v. 50, n. 1, p. 9–25, 2017. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.089. Acesso em: 22 jul. 2024.