| Gravina, Richard; Nelezek Barko, Robert; Tchalalao Abina, Robert | Mbuko lexicon | 2003 | | Linguistics |
| Gravina, Richard | The Verb Phrase in Mbuko | 2001 | | Linguistics |
| Gravina, Richard | Mbuko Provisional Orthography | 1998 | | Linguistics |
| Gravina, Richard | The phonology of Mbuko | 1999 | | Linguistics |
| Gravina, Richard | The vowel system of Mbuko | 1997 | | Linguistics |
| Gravina, Richard; Gravina, Susan | Dictionnaire Mbuko | 2016 | | Linguistics |
| Gravina, Richard | Topic and Focus in Mbuko Discourse | 2000 | | Linguistics |
| Gravina, Richard | The Use of Additive Particles in Mbuko Discourse | 2000 | | Linguistics |
| Gravina, Richard | Features of a Chadic language: the case of Mbuko phonology | 2001 | Grammatische analysen Afrikanischer Sprachen | Linguistics |
| Lovestrand, Joseph; Olson, Emily; Gravina, Richard | Dictionnaire Mbuko - français - anglais | 2022 | | Linguistics |
| Gravina, Richard; Nelezek Barko, Robert; Tchalalao Abina, Robert | Mbuko - French - English lexicon | 2003 | | Linguistics |
