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Sigmund Freud, James Strachey, , , Fiction and Its Phantoms: A Reading of Freud's Das Unheimliche (The "Uncanny"), New Literary History, Vol. 7, No. 3, Thinking in the Arts, Sciences, and Literature (Spring, 1976), pp. 525-548+619-645
Freud et al. (Thu,) studied this question.