GAARDE, A.; GRUBB, G. Logarithms and sectorial projections for elliptic boundary problems. MATHEMATICA SCANDINAVICA, [S. l.], v. 103, n. 2, p. 243–277, 2008. DOI: 10.7146/math.scand.a-15079. Disponível em: https://www.mscand.dk/article/view/15079. Acesso em: 30 apr. 2024.