Siebert, Ralph and Lydia Hoeft. 2001. "Sociolinguistic Survey Report of the Languages of the Abbaya/Chamo Area of Ethiopia." pt. 1: 33. SIL International.
Siebert, Ralph and Simon Caudwell. 2002. "Sociolinguistic Survey Report of the Melo (Malo) and Mursi Languages of Ethiopia." 23. SIL International.
Shimizu, Kiyoshi. 1971. "The Kente Dialect of Kpan (1)." In Research notes from the Dept. of Linguistics and Nigerian Languages, Univ. of Ibadan, 4 , no. 2/3: 1-50.
