1. Baldini, Gianfranco. 2011. The different trajectories of Italian electoral reforms. West European Politics 3:644–663.
2. Baldini, Gianfranco, and Alan Renwick. 2015. Italy toward (yet another) electoral reform. Italian Politics 1:160–178.
3. Biorcio, Roberto, and Paolo Natale. 2018. Il Movimento 5 Stelle: dalla protesta al governo. Milano, Udine: Mimesis Edizioni.
4. Bolgherini, Silvia. 2016a. Mattarellum. In Italien-Lexikon, 2nd edn., ed. Richard Brütting, Birgit Rauen, 561–562. Berlin: Erich Schmidt.
5. Bolgherini, Silvia. 2016b. Porcellum. In Italien-Lexikon, 2nd edn., ed. Richard Brütting, Birgit Rauen, 704–705. Berlin: Erich Schmidt.