1. Social innovation in the public sector: An integrative framework;Bekkers,2013
2. Social Investment in Europe. A study of national policies, European Commission, Directorate- General for Employment, Social Affairs and Inclusion;Bouget,2015
3. Theoretical approaches to social innovation–a critical literature review;Butzin,2014
4. Literature review on innovation in social services in Europe – Sectors of health, education and welfare services;Crepaldi,2012