BOAS, R. P. Jr. Inequalities for functions of exponential type. Mathematica Scandinavica, Berkeley, CA, United States, v. 4, p. 29–32, 1956. DOI: 10.7146/math.scand.a-10453. Disponível em: https://journals.msp.org/mscand/article/view/2866. Acesso em: 25 jul. 2026.