HERRON, D. A. Uniform metric spaces, annular quasiconvexity and pointed tangent spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 108, n. 1, p. 115–145, 2011. DOI: 10.7146/math.scand.a-15163. Disponível em: https://www.mscand.dk/article/view/15163. Acesso em: 28 apr. 2024.