Singer, Cs (June 2012). "Ultralight Solar Powered Hybrid Research Drone". Concepts and Approaches for Mars Exploration. 1679: 4059. arXiv:1304.5098. Bibcode:2012LPICo1679.4059S.
Singer, Cs (June 2012). "Ultralight Solar Powered Hybrid Research Drone". Concepts and Approaches for Mars Exploration. 1679: 4059. arXiv:1304.5098. Bibcode:2012LPICo1679.4059S.