Petrillo, Pier Luigi. “La Perenne Campagna Elettorale dell’Opposizione Parlamentare in Italia E in Gran Bretagna”. Italian Journal of Electoral Studies (IJES) 51, no. 1 (June 30, 2004): 81–118. Accessed November 24, 2024. https://oaj.fupress.net/index.php/qoe/article/view/12736.