コエ・クワディ語族
Güldemann, Tom and Edward D. Elderkin (2010) 'On External Genealogical Relationships of the Khoe Family.' in Brenzinger, Matthias and Christa König (eds.), Khoisan Languages and Linguistics: the Riezlern Symposium 2003. Quellen zur Khoisan-Forschung 17. Köln: Rüdiger Köppe.
Güldemann and Fehn (2014) 'Kwadi perspective on Khoe verb-juncture constructions'
Güldemann, Tom (forthcoming).