Rog (m)
Retkovci [WSW of Vinkovci; Slavonia region]; NB¹: Gojković oddly, and incorrectly, locates Retkovci in Serbia (near Svrljig); NB²: ➺ homonyms.
Širola, Božidar: Sviraljke s udarnim jezičkom [Aerophones with a beating tongue]. Zagreb, 1937, p.124, 167.
Gojković, Andrijana: Narodni muzički instrumenti [Folk musical instruments]. Beograd, 1979 (»Širola [129]).