Global Security Brief 1: Oil Price Surge Threatens Economic Stability and National Security. Washington, D.C.: Worldwatch Institute.
Environmental Change, Migration and Conflict: Theoretical Analysis and Empirical Explorations. Paper presented at the International Workshop “Human Security and Climate Change” in Asker, Norway, 21-23 June.
The Future of Energy Policy. In: "Foreign Affairs", Vol. 82, No. 4, Juli/August 2003, 132-155.
Energy for Sustainable Development. A Policy Agenda. United Nations Development Programme.
Oil and Violence in Sudan. International Institute for Sustainable Development (IISD)/IUCN-World Conservation Union.