Reference

Williams A. Clemens, Wighart von Koenigswald (1993): A New Skeleton of Kopidodon macrognathus from the Middle Eocene of Messel and the Relationships of Paroxyclaenids and Pantolestids Based on Postcranial Evidence – Kaupia - Darmstädter Beiträge zur Naturgeschichte – 3: 57 - 73.