Fery, H., and Ömer K. Erman. “Five New Species of the longulus-Group of Hydroporus Clairville, 1806 from North-Eastern Turkey (Coleoptera: Dytiscidae)”. Zootaxa, vol. 2033, no. 1, Mar. 2009, pp. 1–12, doi:10.11646/zootaxa.2033.1.1.