1. Crosswind kite power (for large-scale wind power production)
2. Kite Wind Generator, September 2006. http://www.kitewindgenerator.com
3. , , . Control of tethered airfoils for a new class of wind energy generators. Conference on Decision and Control, San Diego, 2006, accepted.
4. The Laddermill, September 2003. http://www.ockels.nl
5. SkySails. SkySails Homepage, 2006. http://www.skysails.info