Grubler, A. ORCID: https://orcid.org/0000-0002-7814-4990 & Pachauri, S. ORCID: https://orcid.org/0000-0001-8138-3178 (2009). Problems with burden-sharing proposal among one billion high emitters. Proceedings of the National Academy of Sciences 106 (43) E122-E123. 10.1073/pnas.0909994106 .