1. Cressey, D. Nature
http://doi.org/hw2
(2012).
2. Macnaghten, P. & Owen, R. Nature 479, 293 (2011).
3. Tollefson, J. Nature 464, 656 (2010).
4. Parthasarathy, S. et al. A Public Good? Geoengineering and Intellectual Property (Univ. Michigan, 2012); available at
http://go.nature.com/scrl4g