Trastulli, Federico. “Two Is Better Than One? Testing a Deductive MARPOR-Based Left-Right Index on Western Europe (1999-2019)”. Italian Journal of Electoral Studies (IJES) 85, no. 2 (December 7, 2022): 59–76. Accessed April 20, 2024. https://oaj.fupress.net/index.php/qoe/article/view/13796.