Nugroho, D. B., T. Mahatma, and Y. Pratomo. “Modeling of Stochastic Volatility to Validate IDR Anchor Currency”. Gadjah Mada International Journal of Business, Vol. 20, no. 2, Aug. 2018, pp. 165-8, https://journal.ugm.ac.id/v3/gamaijb/article/view/15609.