Does Imported Oil Threaten U.S. National Security? RAND Research Brief, May 2009
Improving Russian Energy Efficiency: Next Steps. Russian Analytical Digest, (48) 2008, 9-12.
“Energy-NATO” and “Energy-KSZE”. Adäquate Instrumente zur Sicherung der europäischen Energieversorgung? [“Energy-NATO” and “Energy-CSCE”. Adequate Instruments to secure European energy supply?]. SWP Discussion Paper, May 2007, German Institute for International and Security Affairs, Berlin (co-authored with Oliver Geden and Timo Noetzel)
Der GECF-Gipfel in Katar und die Erfolgsaussichten einer “Gas-OPEC” [GECF’s Qatar Summit and the prospects of a “Gas OPEC”], SWP Policy Brief 26/2007, German Institute for International and Security Affairs (SWP), Berlin.
Global Energy Security. The Challenges Ahead and how to Meet Them. MSC Booklet Paper No. 1, Munich Security Conference 2010