LE DONNE, E. Metric spaces with unique tangents. Annales Fennici Mathematici, [S. l.], v. 36, n. 2, p. 683–694, 2011. DOI: 10.5186/aasfm.2011.3636. Disponível em: https://afm.journal.fi/article/view/135374. Acesso em: 11 apr. 2025.