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.