1. A visual odometer for autonomous helicopter flight
2. , , , , , , , , , & (2005). Mars Exploration Rover surface operations: Driving Opportunity at Meridiani Planum. Paper presented at the IEEE Conference on Systems, Man and Cybernetics, The Big Island, Hi.
3. & (2006). The Mars Exploration Rover surface mobility flight software: Driving ambition. Paper presented at the IEEE Aerospace Conference, volume 5, Big Sky, MT, USA.
4. , & (2004). Omnidirectional visual odometry for a planetary rover. In Proceedings of IROS 2004. http://www.ri.cmu.edu/pubs/pub_4913.html.