Gould, Kenneth A., Tammy L. Lewis, and J. Timmons Roberts. “Blue-Green Coalitions: Constraints and Possibilities in the Post 9-11 Political Environment”. Journal of World-Systems Research 10, no. 1 (February 26, 2004): 91–116. Accessed April 19, 2024. https://jwsr.pitt.edu/ojs/jwsr/article/view/314.