DALAL, S. S. On the Zeros of an Entire Function III. MATHEMATICA SCANDINAVICA, [S. l.], v. 22, p. 108–114, 1968. DOI: 10.7146/math.scand.a-10875. Disponível em: https://www.mscand.dk/article/view/10875. Acesso em: 3 may. 2024.