COURTNEY, Dennis; SARASON, Donald. A mini-max problem for self-adjoint Toeplitz matrices. Mathematica Scandinavica, Berkeley, CA, United States, v. 110, n. 1, p. 82–98, 2012. DOI: 10.7146/math.scand.a-15198. Disponível em: https://journals.msp.org/mscand/article/view/499. Acesso em: 24 jul. 2026.