“Autocovariance and Autocorrelation Structures of the Generalised Autoregressive Moving Average (GARMA(1,3;δ,1)) Model”. Malaysian Journal of Fundamental and Applied Sciences 13, no. 2 (June 19, 2017). Accessed September 14, 2026. https://mjfas.utm.my/index.php/mjfas/article/view/571.