PUROHIT, Sunil Dutt; RAINA, Ravinder Krishna. Certain subclasses of analytic functions associated with fractional $q$-calculus operators. Mathematica Scandinavica, Berkeley, CA, United States, v. 109, n. 1, p. 55–70, 2011. DOI: 10.7146/math.scand.a-15177. Disponível em: https://journals.msp.org/mscand/article/view/520. Acesso em: 24 jul. 2026.