ハードSF
New York: Tor. ISBN 0-312-87635-1
↑ Westfahl, Gary (1996-02-28). “Introduction”. Cosmic Engineers: A Study of Hard Science Fiction (Contributions to the Study of Science Fiction and Fantasy). Greenwood Press. p. 2. ISBN 0313297274. http://www.amazon.com/gp/reader/0313297274/ref=sib_fs_bod/102-2504711-0986542?ie=UTF8&p=S00J&checkSum=ZwwEGNBG6d5NLftyICuVTufBHo5H7Wz8ym1GDkXz0Sk%3D#reader-link 2007年10月7日閲覧. "hard science fiction ... the term was first used by P. Schuyler Miller in 1957"
↑ Samuelson, David N. (July 1993). “Modes of Extrapolation: The Formulas of Hard Science Fiction”.