1. See S. Hobe, J. Cloppenburg, Towards a new aerospace convention? Selected legal issues of “Space tourism”, in: Proceedings of the 47th Colloquium on the Law of Outer Space, 2004, pp. 377–385.
2. Legal aspects of space tourism;Hobe;Nebraska Law Review,2007
3. S. Hobe, J. Cloppenburg, supra note 1, p. 377; S. Hobe, supra note 1, p. 439.
4. Online: X PRIZE Foundation 〈http://space.xprize.org/ansari-x-prize〉 last accessed June 2009.
5. S. Hobe, J. Cloppenburg, supra note 1, p. 377.