Werke:
- Vogellaute als taxonomische Merkmale
- A multilocus molecular phylogeny for the avian genus Liocichla (Passeriformes: Leiothrichidae: Liocichla)
- Differentiation processes in treecreepers (Aves: Certhia) : phylogeny, vocalisations, morphometrics
- How weather instead of urbanity measures affects song trait variability in three European passerine bird species