Template:Jäch & Díaz, 1999
- Jäch, M.A. & Díaz, J.A. 1999. The genus Hydraena Kugelann, 1794 (Insecta: Coleoptera: Hydraenidae) in the Ryukyu Archipelago (Nansei-shoto), Japan. Annalen des Naturhistorischen Museums in Wien 101B: 201-215. Full article (PDF).