1. Lakhani, K. R., Jeppesen, L. B., Lohse, P. A. & Panetta, J. A. The Value of Openness in Scientific Problem Solving Harvard Business School Working Paper (2007).
2. Elsevier. A Review of the UK's Interdisciplinary Research Using a Citation-based Approach (HEFCE, 2015).
3. Department for Business, Innovation & Skills. Triennial Review of the Research Councils (BIS, 2014).
4. Klein, J. T. in The Oxford Handbook of Interdisciplinarity (eds Frodeman, R. et al.) 15–30 (Oxford Univ. Press, 2010).
5. German Research Foundation. Interdisciplinary Review Processes: Structural Impact and Funding Success (DFG, 2013); available at
http://go.nature.com/uyfxlp
(in German).