Phipps, Gregory (2021). "Death and Recognition in William Sleator's The Duplicate and G. W. F. Hegel's Parable of Lordship and Bondage". Children's Literature. 49: 114–138. doi:10.1353/chl.2021.0008. S2CID236735321.
Phipps, Gregory (2021). "Death and Recognition in William Sleator's The Duplicate and G. W. F. Hegel's Parable of Lordship and Bondage". Children's Literature. 49: 114–138. doi:10.1353/chl.2021.0008. S2CID236735321.