Oliveira, S.C. de e Andrade, M.G. de 2012. <b>Stochastic models with heteroskedasticity: a Bayesian approach for Ibovespa returns</b> - doi: 10.4025/actascitechnol.v35i2.13547. Acta Scientiarum. Technology. 35, 2 (dez. 2012), 339–347. DOI:https://doi.org/10.4025/actascitechnol.v35i2.13547.