{{sfn|Rice|Wartzok|Society for Marine Mammalogy|1998|p=}}
* {{cite book | last=Rice | first=Dale W. | last2=Wartzok | first2=Douglas | author3=Society for Marine Mammalogy | title=Marine mammals of the world: systematics and distribution | publisher=Society for Marine Mammalogy | publication-place=Lawrence, KS | date=1998 | isbn=1-891276-03-4}}
<ref name="z444">{{cite book | last=Rice | first=Dale W. | last2=Wartzok | first2=Douglas | author3=Society for Marine Mammalogy | title=Marine mammals of the world: systematics and distribution | publisher=Society for Marine Mammalogy | publication-place=Lawrence, KS | date=1998 | isbn=1-891276-03-4 | page=}}</ref>