English
Reference
Hans Schneider (2004): The Advertisement Call of Hyla intermedia Boulenger, 1882 in Comparison to that of Hyla arborea arborea (Linnaeus, 1758) (Anura: Hylidae) – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 52: 115 - 120.
