MARZO, Jordi; SEIP, Kristian. The Kadets $1/4$ theorem for polynomials. Mathematica Scandinavica, Berkeley, CA, United States, v. 104, n. 2, p. 311–318, 2009. DOI: 10.7146/math.scand.a-15100. Disponível em: https://journals.msp.org/mscand/article/view/597. Acesso em: 24 jul. 2026.