PERSSON, J. A Boundary Problem for Analytic Linear Systems with Data on Intersecting Hyperplanes. MATHEMATICA SCANDINAVICA, [S. l.], v. 14, p. 106–110, 1964. DOI: 10.7146/math.scand.a-10710. Disponível em: https://www.mscand.dk/article/view/10710. Acesso em: 20 apr. 2024.