Hamilton, James Douglas. "Chapter 14 Exercise". Time Series Analysis, Princeton: Princeton University Press, 1994, pp. 432-433. https://doi.org/10.1515/9780691218632-128
Hamilton, James Douglas. "Chapter 14 Exercise" In Time Series Analysis, 432-433. Princeton: Princeton University Press, 1994. https://doi.org/10.1515/9780691218632-128