REICH, E. On the L1 approximation of |f(z)| by Ref(z) for analytic functions. Annales Fennici Mathematici, [S. l.], v. 27, n. 2, p. 373–380, 2002. Disponível em: https://afm.journal.fi/article/view/135050. Acesso em: 25 nov. 2024.