GASK, H. A Proof of Schwartz’s Kernel Theorem. Mathematica Scandinavica, Berkeley, CA, United States, v. 8, p. 327–332, 1960. DOI: 10.7146/math.scand.a-10614. Disponível em: https://journals.msp.org/mscand/article/view/2727. Acesso em: 25 jul. 2026.