1. Ascent and decline of monodactyl equids: a case for prehistoric overkill;Azzaroli;Ann. Zool. Fennici,1992
2. Patterns of the Old World hipparionine evolutionary diversification and biogeographic extension;Bernor,1989
3. Bravo-CuevasV. M. Los équidos mesomiocénicos del estado de Oaxaca: Taxonomía e implicaciones paleobiológicas2000
4. Merychippus (Mammalia, Perissodactyla, Equidae) from the Middle Miocene of the State of Oaxaca, Southeastern Mexico;Bravo-Cuevas;Geobios-Lyon,2006