Rustambek Abdullaev, Sayidafzal Mallakhanov, Iroda Dadadjanova: Katta ashula – a unique song heritage of Uzbekistan. (PDF) 2nd Workshop for Better Practices in Communities’ revitalization. Asia-Pacific Cultural Centre for UNESCO (ACCU), Japan, 13.–15. November 2009, S. 2
Rafis Abazov: Culture and Customs of the Central Asian Republics. Greenwood Press, Westport CT 2007, S. 156; 103.9.88.89 (Memento vom 8. August 2014 im Internet Archive; PDF)
