* {{cite book | last=Geist | first=Valerius | title=Deer of the world: their evolution, behaviour, and ecology | publisher=Stackpole Books | publication-place=Mechanicsburg, Pa | date=1998 | isbn=0-8117-0496-3}}
<ref name="e002">{{cite book | last=Geist | first=Valerius | title=Deer of the world: their evolution, behaviour, and ecology | publisher=Stackpole Books | publication-place=Mechanicsburg, Pa | date=1998 | isbn=0-8117-0496-3 | page=}}</ref>