I used these resources when researching the annotations for this fairy tale. Most should be available through your local library, but I have included links to the titles on Amazon.com for further reading.

Altman, Anna E. and Gail de Vos. Tales, Then and Now: More Folktales As Literary Fictions for Young Adults. Englewood, CO: Libraries Unlimited, 2001.
Amazon.com: Buy the book in paperback.

Andersen, Hans Christian. The True Story of My Life: A Sketch. Mary Howitt, translator.Boston: James Munroe, 1847.

Ashliman, D. L.  A Guide to Folktales in the English Language.New York: Greenwood Press, 1987.
Amazon.com: Buy the book in hardcover.

Ashliman, D. L.  The Grimm Brothers' Children's and Household Tales (Fairy Tales).
URL: http://www.pitt.edu/~dash/grimmtales.html.
Accessed on 10 December 1998.

Bernheimer, Kate.  Mirror, Mirror On The Wall: Women Explore Their Favorite Fairy Tales.  New York: Anchor Books, 1998.
Amazon.com: Buy the book in paperback.

Bettelheim, Bruno.  The Uses of Enchantment: The Meaning and Importance of Fairy Tales.  New York: Vintage Books, 1975.
Amazon.com: Buy the book in paperback.

Cashdan, Sheldon. The Witch Must Die. New York: Basic, 1999.
Amazon.com: Buy the book in paperback.

Chevalier, Jean and Alain Gheerbrant. A Dictionary of Symbols, Second Edition. Translated by John Buchanan-Brown. New York: Penguin Books, 1982.
Amazon.com: Buy the book in paperback.

de Vos, Gail and Anna E. Altmann. New Tales for Old : Folktales As Literary Fictions for Young Adults. Englewood, CO: Libraries Unlimited, 1999.
Amazon.com: Buy the book in paperback.

Einfield, Jann, ed. Fairy Tales. San Diego: Greenhaven Press, 2001.
Amazon.com: Buy the book in hardcover.

Frank, Jeffrey and Diana Crone Frank.  The Stories of Hans Christian Andersen: A New Translation from the Danish.  New York: Houghton Mifflin, 2003.
Amazon.com: Buy the book in hardcover.

Internet Movie Database.
URL: http://www.imdb.org.
Accessed on May 8, 2002.

Leach, Maria.  Funk & Wagnalls Standard Dictionary of Folklore Mythology and Legend.  New York: Funk & Wagnalls, 1949.
Amazon.com: Buy the book in paperback.

Lokke, Karri. "The Romantic Fairy Tale." Companion to European Romanticism. Michael Ferber, editor. Malden, MA: Blackwell Publishing, 2005.

"Jenny Lind." Wikipedia. Wikimedia Foundation, Inc. Accessed on September 28, 2006.
<http://en.wikipedia.org/wiki/Jenny_Lind>

Murphy, Bruce, ed.  Benet's Reader's Encyclopedia, Fourth Edition.  New York: Harper Collins, 1996.
Amazon.com: Buy the book in hardcover.

The New Lexicon Webster's Dictionary of the English Language, 1990 Edition.  New York: Lexicon Publications, 1990.

"Nightingale." Wikipedia. Wikimedia Foundation, Inc. Accessed on September 28, 2006.
<http://en.wikipedia.org/wiki/Nightingale>

Olderr, Steven. Symbolism: A Comprehensive Dictionary. Jefferson, NC: McFarland & Company, 1986.
Amazon.com: Buy the book in hardcover.

"Porcelain." Wikipedia. Wikimedia Foundation, Inc. Accessed on September 28, 2006.
<http://en.wikipedia.org/wiki/Porcelain>

Propp, Vladimir. Morphology of the Folktale. Austin: University of Texas, 1968.
Amazon.com: Buy the book in paperback.

Tatar, Maria M., ed. The Classic Fairy Tales. New York: W. W. Norton, 1999.
Amazon.com: Buy the book in paperback.

Tatar, Maria M. The Hard Facts of the Grimms' Fairy Tales. Princeton: Princeton University, 1987.
Amazon.com: Buy the book in paperback.

Thompson, Stith. The Folktale. New York: Holt, Rinehart, and Winston, 1946.
Amazon.com: Buy the book in paperback.

Tolkien, J. R. R. "On Fairy Stories." Tree and Leaf. Boston: Houghton Mifflin, 1965.
Amazon.com: Buy the book in paperback.

Wullschlager, Jackie. Hans Christian Andersen: The Life of a Storyteller. Chicago: University of Chicago Press, 2000.
Amazon.com: Buy the book in hardcover or paperback.

Yolen, Jane. Touch Magic. Little Rock: August House, 2000.
Amazon.com: Buy the book in paperback.

Zipes, Jack. Fairy Tales and the Art of Subversion: The Classical Genre for Children and the Process of Civilization. New York: Routledge, 1985.
Amazon.com: Buy the book in paperback.

Zipes, Jack, ed. The Great Fairy Tale Tradition: From Straparola and Basile to the Brothers Grimm. New York: W. W. Norton, 2001.
Amazon.com: Buy the book in paperback.

Zipes, Jack, ed. The Oxford Companion to Fairy Tales. Oxford: Oxford University, 2000.
Amazon.com: Buy the book in paperback.

Zipes, Jack. "Hans Christian Andersen and the Discourse of the Dominated." When Dreams Come True. London; New York: Routledge, 1998.
Amazon.com: Buy the book in paperback.