1. Angelone C, Zhang Z-Q (2021) Climate change and evolution of early lagomorphs (Mammalia): A study perspective based on new materials of Ordolagus from Nei Mongol (northern China). Vertebr PalAsiat 59:138–168.
2. Bai B, Wang Y-Q, Zhang Z-Q (2018) The late Eocene hyracodontid perissodactyl Ardynia from Saint Jacques, Inner Mongolia, China and its implications for the potential Eocene–Oligocene boundary. Palaeoworld 27:247–257.
3. Bärmann EV, Rössner GE (2011) Dental nomenclature in Ruminantia: Towards a standard terminological framework. Mammal Biol 76:762–768.
4. Bouvrain G, Geraads D (1985) Un squelette complet de Bachitherium (Artiodactyla, Mammalia), de l’Oligocène de Céreste (Alpes de Haute Provence). Remarques sur la systématique des ruminants primitifs. Comp Rend Acad Sci Paris Sér 2 300(2):75–78.
5. Bouvrain G, Geraads D, Sudre J (1986) Révision taxonomique de quelques ruminants Oligocènes des phosphorites du Quercy. Comp Rend Acad Sci Paris Sér 2 302(2):101–104.