Collis, Christy (2009). “The Geostationary Orbit: A Critical Legal Geography of Space's Most Valuable Real Estate”. 《The Sociological Review》 (SAGE Publications) 57 (1_suppl): 47–65. doi:10.1111/j.1467-954x.2009.01816.x. ISSN0038-0261. S2CID127857448.
Collis, Christy (2009). “The Geostationary Orbit: A Critical Legal Geography of Space's Most Valuable Real Estate”. 《The Sociological Review》 (SAGE Publications) 57 (1_suppl): 47–65. doi:10.1111/j.1467-954x.2009.01816.x. ISSN0038-0261. S2CID127857448.
Collis, Christy (2009). “The Geostationary Orbit: A Critical Legal Geography of Space's Most Valuable Real Estate”. 《The Sociological Review》 (SAGE Publications) 57 (1_suppl): 47–65. doi:10.1111/j.1467-954x.2009.01816.x. ISSN0038-0261. S2CID127857448.