(EN) Carl Abbott, Homesteading on the Extraterrestrial Frontier, in Science Fiction Studies, vol. 32, n. 2, luglio 2005, pp. 240–264, ISSN 0091-7729 (WC · ACNP).
(EN) Carl Abbott, Homesteading on the Extraterrestrial Frontier, in Science Fiction Studies, vol. 32, n. 2, luglio 2005, pp. 240–264, ISSN 0091-7729 (WC · ACNP).