Dick's story "Waterspider" features Poul Anderson as one of the main characters. The author refers to himself and his stories "The Variable Man" and "The Defenders", and mentions several other science fiction writers of the period, including Murray Leinster, A. E. van Vogt, Margaret St. Clair, Jack Vance, and Isaac Asimov.
- "Waterspider". philipkdickfans.com. Retrieved July 4, 2018.
- Dozois, Gardner R. (1993). The Year's Best Science Fiction: Fourth Annual Collection. Macmillan. ISBN 9780312094232. Retrieved July 4, 2018.
- Rossi, Umberto (2011). The Twisted Worlds of Philip K. Dick: A Reading of Twenty Ontologically Uncertain Novels. McFarland. p. 16. ISBN 9780786448838. Retrieved July 4, 2018.
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