Ngang, David; Ulfers, Robert | A practical study of the orthography of compound words in the Karang language (ALCAM 352) | 2000 | | Literacy and Education |
Ulfers, Robert Ernst, compiler | Dictionnaire karang - français | 2007 | | Linguistics |
Ngang, David; Ulfers, Robert | Mbete firma fe ke nzak karaŋ 1 ke 2 (Présyllabaires volumes 1 et 2 en langue karang) | 1998 | | |
Ngang, David; Ubels, Virginia; Ulfers, Robert; Yapélé, Jean-Pierre | Mbete firma fe ke nzak karaŋ 5 (Syllabaire volume 5 en langue karang) | 2001 | | |
Ngang, David; Ubels, Virginia; Ulfers, Robert; Yapélé, Jean-Pierre | Mbete firma fe ke nzak karaŋ 6 (Syllabaire volume 6 en langue karang) | 2001 | | |
Ulfers, Robert | Narrative genre text collection for discourse grammar analysis in Karang | 1993 | | Linguistics |
L'équipe de traduction du Centre de Littérature Karang | Zaneɗ ke Sena Ndariya | 1998 | | |
Ulfers, Robert | Dictionnaire Karang | 2019 | | Linguistics |