Silverberg, Robert
Amazing Stories 67(3): 5-6. June 1992.
Dionne, Mark J.
Master's Thesis, University of Connecticut, 1996. 71pp.
Palumbo, Donald E.
Foundation No. 80: 19-40. Autumn 2000.
Purser-Hallard, Philip
D. Phil. Dissertation, Christ Church (University of Oxford), 2002. x, 274 p. (DAI-C 70(31).) 
George Bernard Shaw, David Lindsay, Olaf Stapledon, CS Lewis, Arthur C Clarke, James Blish, Isaac Asimov, Brian Aldiss, Philip K Dick, Bruce Sterling, William Gibson and Dan Simmons
Brummond, Michael
Online resource: http://www.angelfire.com/wi/mikebru/Alps.html [6 p.]
No authors listed.
Hailing Frequencies (Waldenbooks) No. 6: 1-2, 4. 1993.
Freedman, Carl H.
Extrapolation 39(2): 128-138. Summer 1998.
Gabai, Sara
Master's Thesis, Bar Ilan University, Ramat Gan, Israel, 2013. 96 p.
Science Fiction Chronicle 11(7): 4. April 1990.
Torras, Carme
Interaction Studies 11(2): 269-273. 2010.
Thomsen, C. W.
in: Dunn, T. P., ed. The Mechanical God. Westport: Greenwood, 1982. pp. 27-39.
Ramrajm , Ruby S.
in: Leroux, Jean-Francois/La Bossiere, Camille R., eds. Worlds of Wonder: Readings in Canadian Science Fiction and Fantasy Literature. Ottawa: University of Ottawa Press, 2004. p. 139-146.
Auger, Emily E.
Foundation No. 107: 21-38. Winter 2009.
Geraci, Robert M.
Zygon 42(4): 961-980. December 2007.
Kakela, Jari
New York Review of Science Fiction 23(8): 11-15. April 2011. (No. 272)
Hailing Frequencies (Waldenbooks) No. 6: 7, 17. 1993.
Westfahl, Gary
Interzone No. 185: 53-55. January 2003.
Scott, Andrew
Master's Thesis, Western Illinois University, 2008. 68 p.
Jerome, Fred
Reprinted in: Freedman, Carl, ed. Conversations with Isaac Asimov. Jackson: University Press of Mississippi, 2005. p. 85-94. Reprinted from Current, November 1981.
Gotthard, Gùˆnther
Lüneburg: Dieter von Reeken, 2015. 137 p.
Gupta, Pragya
in: Sarwal, Geetha B. and Sarwal, Amit, eds. Exploring Science Fiction: Text and Pedagogy. New Delhi: SSS Publications, 2011. p. 64-77.
Hassler, Donald M.
Extrapolation 28(2):187-195. Summer 1987.
Idier, Dominic
Technology in Society 22: 255-272. 2000.
Bellefontaine, Eric N.
Master's Thesis, University of Maine, 1973. 98 p.
Abbate, Janet E.
A. B. Honors Thesis, Harvard University, 1985. 66pp.
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