PASQUALE, Angela. The $\Theta$-spherical transform and its inversion. Mathematica Scandinavica, Berkeley, CA, United States, v. 95, n. 2, p. 265–284, 2004. DOI: 10.7146/math.scand.a-14459. Disponível em: https://journals.msp.org/mscand/article/view/760. Acesso em: 8 sep. 2026.