"It is therefore quite possible that these stories influenced me subconsciously when ... I worked out the principles of synchronous communications satellites ...", McAleer, Neil (1992). Arthur C. Clarke. Contemporary Books. стр. 54. ISBN978-0-809-24324-2.
"(Korvus's message is sent) to a small, squat building at the outskirts of Northern Landing. It was hurled at the sky. ... It ... arrived at the relay station tired and worn, ... when it reached a space station only five hundred miles above the city of North Landing." Smith, George O. (1976). The Complete Venus Equilateral. New York: Ballantine Books. стр. 3—4. ISBN978-0-345-28953-7.
Jenkin, A.B.; McVey, J.P.; Wilson, J.R.; Sorge, M.E. (2017). Tundra Disposal Orbit Study. 7th European Conference on Space Debris. ESA Space Debris Office. Архивирано из оригинала 2017-10-02. г. Приступљено 2017-10-02.
„What is orbit?”. NASA. 25. 10. 2001. Архивирано из оригинала 06. 04. 2013. г. Приступљено 2013-03-10. „Satellites that seem to be attached to some location on Earth are in Geosynchronous Earth Orbit (GEO)...Satellites headed for GEO first go to an elliptical orbit with an apogee about 23,000 miles. Firing the rocket engines at apogee then makes the orbit round. Geosynchronous orbits are also called geostationary.”CS1 одржавање: Формат датума (веза)
„What is orbit?”. NASA. 25. 10. 2001. Архивирано из оригинала 06. 04. 2013. г. Приступљено 2013-03-10. „Satellites that seem to be attached to some location on Earth are in Geosynchronous Earth Orbit (GEO)...Satellites headed for GEO first go to an elliptical orbit with an apogee about 23,000 miles. Firing the rocket engines at apogee then makes the orbit round. Geosynchronous orbits are also called geostationary.”CS1 одржавање: Формат датума (веза)
Jenkin, A.B.; McVey, J.P.; Wilson, J.R.; Sorge, M.E. (2017). Tundra Disposal Orbit Study. 7th European Conference on Space Debris. ESA Space Debris Office. Архивирано из оригинала 2017-10-02. г. Приступљено 2017-10-02.
