PERSSON, Jan. A Boundary Problem for Analytic Linear Systems with Data on Intersecting Hyperplanes. Mathematica Scandinavica, Berkeley, CA, United States, v. 14, p. 106–110, 1964. DOI: 10.7146/math.scand.a-10710. Disponível em: https://journals.msp.org/mscand/article/view/2594. Acesso em: 25 jul. 2026.