| Amadou, Jacob; Baitoua, Jean-Pierre; Magdeme, Gabriel; Pourtshom, Henri; Douatai, Daniel; Haller, Beat; Lawarum, Ayouba | Zulgo lexicon | 2003 | | Linguistics |
| Giger, Martha; Gravina, Richard; Haller, Beat; Lawarum, Ayouba; Boumbouloh, Jean; Doumok, Elie | Sənəkwakwa ha bo ka mədzeŋge 3 | 2001 | | |
| Haller, Beat; Haller, Irma; Lawarum, Ayouba | Mandzà zayzay gà mburma ana ta bere a ba ya | 1986 | | |
| Haller, Beat; Haller, Irma; Lawarum, Ayouba | Mandzà zayzay gà màma ana ti ndze a nda gà ɓèza lèlè ya | 1984 | | |
| Haller, Beat; Haller, Irma; Lawarum, Ayouba | Sǝ̀kǝ̀hakwa à medzeŋge | 1981 | | |
| Haller, Beat; Haller, Irma; Lawarum, Ayouba | Sinikukwa dǝr ba aà medzeŋge | 1980 | | |
| Haller, Beat | Zulgo-French-Fulfulde lexicon | 2003 | | Linguistics |
