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Nikolajeva 2012, p.56. Nikolajeva, Maria (2012), "The development of children's fantasy", in James, Edward; Mendlesohn, Farah (eds.), The Cambridge Companion to Fantasy Literature, Cambridge, England: Cambridge University Press, pp.50–61, ISBN978-0-521-72873-7, archived from the original on 19 February 2024, retrieved 5 October 2020