PRASAD, S. D. Certain $q$-Transforms. MATHEMATICA SCANDINAVICA, [S. l.], v. 30, p. 324–330, 1972. DOI: 10.7146/math.scand.a-11088. Disponível em: https://www.mscand.dk/article/view/11088. Acesso em: 6 may. 2024.