GASK, H. A Proof of Schwartz’s Kernel Theorem. MATHEMATICA SCANDINAVICA, [S. l.], v. 8, p. 327–332, 1960. DOI: 10.7146/math.scand.a-10614. Disponível em: https://www.mscand.dk/article/view/10614. Acesso em: 3 may. 2024.