Attebery, Jennifer Eastman (1996). "The Trolls of Fiction: Ogres or Warm Fuzzies?". Journal of the Fantastic in the Arts. 7 (1 (25)): 61–74. JSTOR43308256. The comedy is conveyed chiefly through the trolls' lower class British dialect and their clumsy handling of little Bilbo
Hartley, Gregory (2014). "Civilized goblins and Talking Animals: How The Hobbit Created Problems of Sentience for Tolkien". In Bradford Lee Eden (ed.). The Hobbit and Tolkien's mythology : essays on revisions and influences. Vol. Part III: Themes. McFarland. ISBN978-0-7864-7960-3. OCLC889426663.