PARRA, R. B. De De; ARIAS, A. F. On the Valiron deficiencies of oriented functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 69, p. 31–44, 1991. DOI: 10.7146/math.scand.a-12367. Disponível em: https://www.mscand.dk/article/view/12367. Acesso em: 5 dec. 2025.