Soundtransformations, Michael Ormiston & Candida Valentino Web PagesScientific American Article September 1999
Theodore C.Levin & Michael E.Edgerton: The Throat Singers in Tuva, in Scientific American Article, pp: 80-87, USA, 1999.
http://www.soundtransformations.co.uk/Scientific%201999
http://www.uvm.edu/~outreach/ThroatSingingArticle.pdf


