[28282] Blench, Roger M. (2014) : An Introduction to Zul
[24553] Caron, Bernard (2002) : Notes de terrains sur les langues sud-Bauchi
[4585] Cosper, Ronald (1998) : Polci
[4586] Cosper, Ronald (1999) : Barawa lexicon: a wordlist of eight South Bauchi (West Chadic) languages - Boghom, Buli, Dott, Geji, Jimi, Polci, Sayanci and Zul
[25410] Cosper, Ronald (2008) : Cross-Validation of Lexical Data in Chadic: A Comnparison of Sources in South Bauchi
[11273] Kraft, Charles H. (Ed) (1981) : Chadic wordlists - Volume I (“Plateau-Sahel”)
[25400] Takács, Gábor (Ed) (2008) : Semito-Hamitic festschrift for A.B. Dolgopolsky and H. Jungraithmayr