WALLSTÉN, Robert. The $S^p$-criterion for Hankel forms on the Fock space, $0 < p < 1$. Mathematica Scandinavica, Berkeley, CA, United States, v. 64, p. 123–132, 1989. DOI: 10.7146/math.scand.a-12251. Disponível em: https://journals.msp.org/mscand/article/view/1395. Acesso em: 24 jul. 2026.