Ruf, I.(2009). Petrosal anatomy and inner ear structures of the Late Jurassic Henkelotherium (Mammalia, Cladotheria, Dryolestoidea): Insight into the early evolution of the ear region in cladotherian mammals. Journal of Anatomy, 214(5), 679-693. doi:10.1111/j.1469-7580.2009.01059.x

Ruf, Irina. "Petrosal Anatomy and Inner Ear Structures of the Late Jurassic Henkelotherium (Mammalia, Cladotheria, Dryolestoidea): Insight Into the Early Evolution of the Ear Region in Cladotherian Mammals". Journal of Anatomy, 214.5 ( 2009 ): 679-693.