POULSEN, Ebbe Thue. Boundary Values in Function Spaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 10, p. 45–52, 1962. DOI: 10.7146/math.scand.a-10512. Disponível em: https://journals.msp.org/mscand/article/view/2676. Acesso em: 25 jul. 2026.