Osipchuk Т. М. Topological and geometric properties of the set of 1-nonconvexity points of a weakly 1-convex set in the plane. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 12, p. 1657–1672, 2021. DOI: 10.37863/umzh.v73i12.6890. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6890. Acesso em: 15 dec. 2025.