Otčenášek, Zdeněk and Otčenášek, Jan (2015) "Roughness of violin tones - the perception of irregularities," in Proceedings of the Third Vienna Talk on Music Acoustics, p. 231-236 edited by Mayer, Alexander; Chatziioannou, Vasileios; Goebl, Werner, Institute Of Music Acoustics (Wiener Klangstil), Vienna, Austria