SUNDHÄLL, Marcus. Schatten-von Neumann properties of bilinear Hankel forms of higher weights. Mathematica Scandinavica, Berkeley, CA, United States, v. 98, n. 2, p. 283–319, 2006. DOI: 10.7146/math.scand.a-14996. Disponível em: https://journals.msp.org/mscand/article/view/701. Acesso em: 24 jul. 2026.