Wei, S.-Y., J.-H. Cheng, L.-W. Lin, and S.-M. Gan. “Volatility Asymmetry of Scale Indexes - Taking China As an Example”. International Journal of Economics and Financial Issues, vol. 10, no. 4, July 2020, pp. 158-69, https://www.econjournals.com/index.php/ijefi/article/view/8200.