WAGENAAR, Charlotte C.L. Amending and Extending Referendum Ballots : Innovations in Referendum Literature and Practice. Politics of the Low Countries, Nijmegen, v. 5, n. 1, p. 7–35, 2023. DOI: 10.5553/PLC/.000041. Disponível em: https://plc-journal.eu/article/view/21593.. Acesso em: 9 oct. 2025.