Sources

Širola, Božidar: Sviraljke s udarnim jezičkom [Aerophones with a beating tongue]. Zagreb, 1937, p.151, 160.

Brömse, Peter: Flöten, Schalmeien und Sackpfeifen Südslawiens. Brünn [Brno], 1937, p.73.

Gojković, Andrijana: Narodni muzički instrumenti [Folk musical instruments]. Beograd, 1979 (»Brömse; »Širola [129]).