ROLEWICZ, S. On $\Phi$-differentiability of functions over metric spaces. Topological Methods in Nonlinear Analysis, [S. l.], v. 5, n. 2, p. 229–236, 1995. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1995.013. Acesso em: 22 jul. 2024.