Altman, Micah, John Fox, Simon Jackman, and Achim Zeileis. “An Introduction to the Special Volume on ‘Political Methodology’”. Journal of Statistical Software 42, no. 1 (June 14, 2011): 1–5. Accessed May 1, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v042i01.