ABAZARI, N.; KHOSHDANI, T. R. Characterization of weakly Berwald fourth root metrics. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 7, p. 976–995, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1491. Acesso em: 5 dec. 2025.