Hartley, J. and Torfing, J. 2016. ‘Innovation’, in Ansell, C. and Torfing, J. (eds.), Handbook of Theories of Governance. Cheltenham: Edward Elgar.
Kingdon, J. W. 1984. Agendas, Alternatives, and Public Policies. Boston: Little Brown.
Petersen, O. H., Hjelmar, U. and Vrangbæk, K. 2015. ‘Is contracting-out still the great panacea? Meta-analysis of international studies of cost and service quality’, presented at the ICCP Conference, Milan, 1–4 July.