Yap, Grace Lee Ching, and Wen Cheong Chin. “An Improvement to LMSV Parameter Estimation: Modelling and Forecasting Volatility and Value-at-Risk”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 27, no. 1, Jan. 2017, pp. 213-3, https://asrjetsjournal.org/American_Scientific_Journal/article/view/2581.