Radev, V., Kanev, I. & Fried, B. (2006)

Comments on eye-flukes (Philophthalmidae Looss, 1819) in the genera Philophthalmus and Natterophthalmus, with a re-designation of the type-species of Natterophthalmus

. Zootaxa, 1223 (1), 19–22.