| Eyoh, Julius A. and Robert Hedinger | Mfumte orthography guide | 2008 | | Literacy and Education |
| Hedinger, Robert | Some issues in the establishment of an orthography for Akɔɔse | 2000 | | Linguistics, Literacy and Education |
| Dadak, Ndokobai; Hedinger, Robert | Proposed Bum orthography statement | 2005 | | Linguistics, Literacy and Education |
| Hedinger, Robert; Njeck, Mathaus | Baba 1 Orthography Guide | 2006 | | Linguistics, Literacy and Education |
| Langhout, Bep, Richard L. Boutwell, Aku Julius Eyoh and Robert Hedinger | Sari Orthography Guide | 2022 | | Linguistics, Literacy and Education |
