1. Retracing labial-velar consonants in Mbum (Adamawa);Afrika und Übersee;2022-12-31
2. Research on the Plateau languages of Central Nigeria;Afrika und Übersee;2020-12-31
3. Contact among African Languages;The Handbook of Language Contact;2020-07-28
4. Preface;A History of African Linguistics;2019-06-13
5. Index – Persons;A History of African Linguistics;2019-06-13