PETERSEN, Karl. The spectrum and commutant of a certain weighted translation operator. MATHEMATICA SCANDINAVICA, [S. l.], v. 37, p. 297–306, 1975. DOI: 10.7146/math.scand.a-11608. Disponível em: https://tidsskrift.dk/math/article/view/11608. Acesso em: 14 aug. 2026.