Fery, Hans, and Ömer Köksal Erman. 2009. “Five New Species of the longulus-Group of Hydroporus Clairville, 1806 from North-Eastern Turkey (Coleoptera: Dytiscidae)”. Zootaxa 2033 (1). Auckland, New Zealand:1–12. https://doi.org/10.11646/zootaxa.2033.1.1.