PRASAD, Sneh D. Certain $q$-Transforms. Mathematica Scandinavica, Berkeley, CA, United States, v. 30, p. 324–330, 1972. DOI: 10.7146/math.scand.a-11088. Disponível em: https://journals.msp.org/mscand/article/view/2238. Acesso em: 25 jul. 2026.