Template:Freitag & Jäch, 2007
- Freitag, H. & Jäch, M.A. 2007. Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d’Orchymont, 1925. Zootaxa 1431: 1–44. Abstract & excerpt.
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