"Utopias Limited: Post-sixties and Postmodern American Fiction" by DeKoven, Marianne. MFS Modern Fiction Studies - Volume 41, Number 1, Spring 1995, pp. 75-97 MUSE "Sethe's miraculous milk drains off into the succubus Beloved has become."
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"Figurations of Rape and the Supernatural in Beloved" by Pamela E. Barnett. PMLA, Vol. 112, No. 3 (May 1997), pp. 418-427 JSTOR