Harrison, Albert A.
New York: Plenum Trade, 1997 383 p.
Lewis, Thomas A.
Master's Thesis, University of Queensland, 1993. 187 p.
Stein, Michael
San Diego: IDW Publishing, 2020. 176 p.
Raphals, Lisa
Science Fiction Studies 40(1): 73-85. March 2013.
Sefler, G. F.
in: Smith, Nicholas D., ed. Philosophers Look at Science Fiction. Chicago: Nelson-Hall, 1982. pp. 67-74.
Macdonald, Ian P.
Literary Geographies 8(2): 190-207. 2022.
Stone, M. D.
Analog 100(6): 57-67. June 1980.
Charters, Lawrence I.
in: Hassler, Donald M., ed. Patterns of the Fantastic II. Mercer Island, WA: Starmont, 1985. pp. 51-58.
Versins, Pierre
in: Knight, Damon, ed. Turning Points: Essays in the Art of Science Fiction. New York: Harper, 1977. pp. 163-167.
Raybeck, Douglas
in: Vakoch, Douglas A., ed. Archaeology, Anthropology, and Interstellar Communication, ed. by Douglas A. Vakoch. Washington, DC: NASA, 2014. p. 143-160.
Bohlander, Michael
Leiden: Brill, 2023. 240 p.
Veleski, Stefan
Aigne Journal 8: 84-106 2020. http://aigne.ucc.ie/index.php/aigne/article/view/1552/1518
Brin, David
Aboriginal Science Fiction 5(2): 24-28. March/April 1991. (No. 26)
Ing, Dean
in: Baen, Jim, ed. New Destinies. Vol. VII, Spring 1989. New York: Baen, 1989. pp.135-153.
Sanchez-Taylor, Joy
Columbus : The Ohio State University Press, 2021. 188 p.
Landragin, Frederic
Le Nouveau Magazine Littéraire No. 29: 76-78. Mai 2020.
Gulyas, Aaron J.
Jefferson, NC: McFarland, 2013. 260 p.
Aires, Nick
in: Westfahl, Gary, ed. The Greenwood Encyclopedia of Science Fiction and Fantasy: Themes, Works, and Wonders. Westport, CT: Greenwood, 2005. pp. 295-297.
Mckeown, Edward
SFWA Bulletin 40(3): 7-10. Winter 2007. (No. 172)
Zivkovic, Zoran
New York: Springer, 2018. 148 p.
Leschke, Wolfgang
Zukunft p. 87-90. January 2010.
Donovan, Robert Alan
South Atlantic Quarterly 81(2): 178-187. Spring 1982.
Elliot, J. M.
Future Life 22: 53-57. November 1980.
Marsiske, Hans-Arthur
Zukunft p. 100-103. January, 2010.
Monk, Patricia
Foundation 37:5-21. Autumn 1986.
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