Hassler, Uwe. “TIME-VARYING VOLATILITY AND NON-STATIONARY TIME SERIES - A Contribution to the Nobel Prize for Robert F. Engle and Clive W. J. Granger”. Journal of European Economy 3, no. 1 (April 26, 2018): 33–42. Accessed November 24, 2024. https://jeej.wunu.edu.ua/index.php/enjee/article/view/1145.