1. Abedi, A. and Lundberg, T.C. (2012) The SNP and Plaid as Anti-Political Establishment Parties. Paper presented to the Political Studies Association Specialist Group: Territorial Politics Biennial Conference, 13–14 September, Brussels, Belgium.
2. BBC News (2005) Plaid urged to find single leader, 9 May, http://news.bbc.co.uk/1/hi/uk_politics/vote_2005/wales/4528351.stm , accessed 29 September 2015.
3. Bolleyer, N. (2008) The organizational costs of public office. In: K. Deschouwer (ed.) New Parties in Government: In Power for the First Time. London: Routledge, pp. 17–44.
4. Carter, C. and Pasquier, R. (2010) Introduction: Studying regions as ‘spaces for politics’: Re-thinking territory and strategic action. Regional and Federal Studies 20(3): 281–294.
5. Coakley, J. (ed.) (1992) The social origins of nationalist movements and explanations of nationalism: A review. In: The Social Origins of Nationalist Movements. London: Sage Publications, pp. 1–12.