Goulielmos, A. M., A. Pardali, and M. Miliaraki. “Applied Theory of Complexity: The Case of Human Factor in the Container Terminal of the Port of Piraeus”. SPOUDAI Journal of Economics and Business, vol. 57, no. 1, Feb. 2007, pp. 36-57, https://spoudai.org/index.php/journal/article/view/341.