Αγιακλόγλου Χρήστος Ν. “An Alternative Approach for Selecting TS Vs. DS Processes Using the Nelson and Plosser Time Series”. SPOUDAI Journal of Economics and Business 51, no. 3-4 (December 15, 2001): 3–15. Accessed April 4, 2025. http://spoudai.org/index.php/journal/article/view/487.