PUROHIT, Sunil Dutt; RAINA, Ravinder Krishna. Certain subclasses of analytic functions associated with fractional $q$-calculus operators. MATHEMATICA SCANDINAVICA, [S. l.], v. 109, n. 1, p. 55–70, 2011. DOI: 10.7146/math.scand.a-15177. Disponível em: https://tidsskrift.dk/math/article/view/15177. Acesso em: 14 aug. 2026.