FEICHTINGER, Hans G. Results on Banach ideals and spaces of multipliers. MATHEMATICA SCANDINAVICA, [S. l.], v. 41, p. 315–324, 1977. DOI: 10.7146/math.scand.a-11724. Disponível em: https://tidsskrift.dk/math/article/view/11724. Acesso em: 14 aug. 2026.