{{sfn | Kühlmann | 2010 | p=}}

* {{cite book | last=Kühlmann | first=Wilhelm | title=Os – Roq | publisher=Walter de Gruyter | publication-place=Berlin New York | date=2010-09-29 | isbn=978-3-11-022045-2 | language=de}}

<ref name="q469">{{cite book | last=Kühlmann | first=Wilhelm | title=Os – Roq | publisher=Walter de Gruyter | publication-place=Berlin New York | date=2010-09-29 | isbn=978-3-11-022045-2 | language=de | page=}}</ref>