Dissertation: Baba Jaga, the Ambiguous Mother of Russian Folktale.
Andreas Johns published a book based on his dissertation:
Baba Yaga : the ambiguous mother and witch of the Russian folktale
New York : Peter Lang, c2004.
International folkloristics ; v. 3
Andreas Johns is Senior Administrative Analyst with the Office of the Secretary and Chief of Staff to the Regents of the University of California