1. Baquero Cruz J (2002) Between competition and free movement: the economic constitutional law of the European Community. Hart Publishing, Oxford and Portland
2. Baquero-Cruz J (2013) Social services of general interest and the state aid rules. In: Neergaard U et al (eds) Social services of General Interest in the EU. T.M.C Asser Press, The Hague
3. Böhlmark A, Lindahl M (2012) Friskolereformens långsiktiga effekter på utbildningsresultat, SNS Analys nr 7 (2012). Accessed 31 Dec 2015 at http://www.sns.se/sites/default/files/sns_analys_nr_7.pdf
4. Davies G (2010) The price of letting courts value solidarity: the judicial role in liberalizing welfare. In: Ross M, Borgmann-Prebil Y (eds) Promoting solidarity in the European Union. Oxford University Press, Oxford
5. Maxian Rusche T (2013) The Almunia package: legal constraints, policy procedures, and political choices. In: Szyszczak E, van de Gronden JW (eds) Financing services of general interest, reform and modernization. T.M.C Asser Press, The Hague