1. Spot satellite messenger, http://www.findmespot.com (accessed June 10, 2011)
2. Dual wing sailed moop sailing robot (2009), http://www.youtube.com/watch?v=X9Hj3jcL5vk (accessed June 10, 2011)
3. Twin wing miniature sailing robot (2010), http://www.youtube.com/watch?v=w8mFVsT23Tw (accessed June 10, 2011)
4. Ammann, N., Hartmann, F., Jauer, P., Bruder, R., Schlaefer, A.: Design for a robotic sailboat for wrsc/sailbot. In: Proceedings of the 3rd International Robotic Sailing Conference, Kingston, Ontario, Canada, pp. 41–43 (June 2010)
5. Ammann, N., Biemann, R., Hartmann, F., Hauft, C., Heinecke, I., Jauer, P., Kruger, J., Meyer, T., Bruder, R., Schlaefer, A.: Towards autonomous one-design sailboat racing: navigation, communication and collision avoidance. In: Proceedings of the 3rd International Robotic Sailing Conference, Kingston, Ontario, Canada, pp. 44–48 (June 2010)