Beverly., Chico (2013-10-03). Hats and headwear around the world : a cultural encyclopedia. Santa Barbara, California. p. 283. ISBN9781610690638. OCLC862077165.{{cite book}}: CS1 maint: location missing publisher (link)
Karen., Evans-Romaine (2014). Encyclopedia of contemporary russian culture. Routledge. p. 215. ISBN9780415758628. OCLC960084469.