ABDULLAYEV, Fahreddin; DOVGOSHEY, Oleksiy; KÜÇÜKASLAN, Mehmet. Metric spaces with unique pretangent spaces. Conditions of the uniqueness. Annales Fennici Mathematici, [S. l.], v. 36, n. 2, p. 353–392, 2011. DOI: 10.5186/aasfm.2011.3623. Disponível em: https://afm.journal.fi/article/view/135355. Acesso em: 9 dec. 2025.