DANIHELOVÁ, Anna - ČULÍK, Martin. String musical instrument with endless bow - Slovak ninera (Hurdy Gurdy). In Material - Acoustics - Place 2013 : 8th international conference, September 18-20, 2013, Zvolen, Slovakia [elektronický zdroj]. - Zvolen : Technical University in Zvolen, 2013. ISBN 978-80-228-2532-0, cD-ROM, [1] p. Požiadavky na systém: CD-ROM mechanika.