1. Accornero, G., & Pinto, P. (2023). Movements at the border. Conflict and protest in Portugal. In E. J. Fernandes, P. Magalhaes, & A. Pinto (Eds.), The Oxford handbook of Portuguese politics (pp. 457–471). Oxford University Press.
2. Alves, M., Santos, A., Barradas, C., & Duarte, M. (2009). A despenalização do aborto em Portugal—Discursos, dinâmicas e acção coletiva: os referendos de 1998 e 2007 (The decriminalization of abortion in Portugal—Discourses, dynamics and collective action: The 1998 and 2007 referendums). Oficina do CES no. 320.
3. Ball, H. (2017). The right to die: A reference handbook. ABC-CLIO.
4. Birkland, T. (2016). An introduction to the policy process theories, concepts, and models of public policy making (4th ed.). Routledge.
5. Budde, E., Knill, C., Fernández-i-Marín, X., & Preidel, C. (2017). A matter of timing: The religious factor and morality policies. Governance, 31(1), 45–63.