Perek, Luboš
Planetary protection: lessons lemed.
Proceedings of the 45th colloquium on the law of outer space. Houston: International Astronautical Federation, 2003, s. 462-465.
[Colloquium on the Law of Outer Space /45./. Houston (US), 10.10.2002-19.10.2002]
http://hdl.handle.net/11104/0023438