Stella doppia (romanzo) (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Stella doppia (romanzo)" in Italian language version.

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(EN) Floyd C. Gale, Galaxy's 5 Star Shelf, in Galaxy Science Fiction, settembre 1956, p. 110. URL consultato il 13 dicembre 2020.
«..an excellent example of his ability to take one of the oldest plots in any literature, that of impersonation, and present it as an enjoyable readng experience.»

Gifford 2000, p. 266. (EN) James Daniel Gifford, The New Heinlein Opus List, in Robert A. Heinlein: A Reader's Companion (PDF), Nitrosyncretic Press, 2000, ISBN 978-0-9679874-1-5. URL consultato il 3 aprile 2016.
Blish, pp. 53-54. (EN) James Blish, More Issues at Hand, sotto lo pseudonimo di William Atheling Jr., Chicago, Advent Publishers Inc., 1970, ISBN 978-0-911682-10-6.

Gifford 2004. (EN) James Gifford, The Published RAH, su site: RAH, nitrosyncretic.com, 2004. URL consultato il 27 dicembre 2015.
Gifford 2000, p. 266. (EN) James Daniel Gifford, The New Heinlein Opus List, in Robert A. Heinlein: A Reader's Companion (PDF), Nitrosyncretic Press, 2000, ISBN 978-0-9679874-1-5. URL consultato il 3 aprile 2016.