ARKERYD, L. On the $L^p$ Estimates for Elliptic Boundary Problems. MATHEMATICA SCANDINAVICA, [S. l.], v. 19, p. 59–76, 1966. DOI: 10.7146/math.scand.a-10796. Disponível em: https://www.mscand.dk/article/view/10796. Acesso em: 27 apr. 2024.