Reference

Meinolf Hellmund (2005): A three-dimensional skeletal reconstruction of the Middle Eocene Propalaeotherium hassiacum HAUPT1925 (Equidae, Perissodactyla, Mammalia) and a modern synoptic painting of some individuals within their habitat – Kaupia - Darmstädter Beiträge zur Naturgeschichte – 14: 15 - 20.