"Hardness" as a semantic audio descriptor for music using automatic feature extraction. - Isabella Czedik-Eysenberg; Denis Knauf; Christoph Reuter (GI-Jahrestagung, 2017)

'Warriors of the Word' - Deciphering Lyrical Topics in Music and Their Connection to Audio Feature Dimensions Based on a Corpus of Over 100, 000 Metal Songs. - Isabella Czedik-Eysenberg; Oliver J. Wieczorek; Christoph Reuter (CoRR, 2019)

Charting the Universe of Metal Music Lyrics and Analyzing Their Relation to Perceived Audio Hardness. - Isabella Czedik-Eysenberg; Oliver J. Wieczorek; Arthur Flexer; Christoph Reuter (Trans. Int. Soc. Music. Inf. Retr., 2024)