The legal status of the moon and other celestial bodies - Studies (selection)
Study on The Moon Agreement and Commercial Space Activities, with the International Law Association (ILA) (1997-2001)
Study on Sovereignty and Space (2002)
Study on Property Rights on the Moon, with the International Institute of Space Law (IISL) (2002-2003)
Study on Space Law, Commercial Activities and Property Rights (2005)
Study on Legal aspects of Planetary Exploration (2006)
Study on The Moon Agreement and the Prospect of Commercial Exploitation of Lunar Resources, (2006-2007)
Study on Planetary Defense, with the Aerospace Corporation and the Association of Space Explorers (ASE) (2007)
Study on legal aspects of international responsive action against Near-Earth Objects (NEO’s), for the Association of Space Explorers (ASE) (2007-2009)
Research study on Legal Aspects of NEO Threat response and Related Institutional Issues, for the University of Nebraska-Lincoln (UNL) and the Secure World Foundation (SWF) (2009-2010)