[5665] Doornbos, Paul (1979-1981) : Unpublished materials on Kodoi/Marfa collected at Beida (informant: Faki Mahmuud, 45, male), Maba collected at Foro Boranga (informants: Faki Muhmadi, 45, male, trader & fakir; Juma Ali, 20, male, tailor), Masalit collected at Foro Boranga (informants: Ibrahim Yahya Abdarraham, 33, male, linguistics graduate; Abu Kora Adam, 45, male, official), Aiki collected at Foro Boranga (informant: Al-Tahir Abakr), and Kibet collected at Foro Boranga (informant: Ahmad Xamiis of Am Timam, 32, male, unemployed)
[25281] Mbernodji, Calvain & Katharina Wolf (2008) : Une enquĂȘte sociolinguistique des parlers kibet, rounga, daggal et mourro du Tchad - rapport technique
[15333] Nougayrol, Pierre (1986) : Note sur la langue kibet (Tchad)