2011 The founding of Kanem by Assyrian Refugees ca. 600 BCE: Documentary, Linguistic, and Archaeological Evidence, Boston, Working Papers in African Studies° 265, 44 p.

2010 "An introduction to the history of Kanem-Borno: The prologue of the Diwan" , Borno Museum Society Newsletter 76-84 (2010), 79-103.

2009 "Biblical patriarchs from a pre-canonical source mentioned in the Diwan of Kanem-Bornu (Lake Chad region) ", Zeitschrift für Alttestamentliche Wissenschaft 121, 4 (2009), 588-597. - "The early magistrates and kings of Kanem as Assyrian state builders", Anthropos, 104, 1, 2009, 3-24.

2008a "Immigration of the Chadic-speaking Sao towards 600 BCE ", Borno Museum Society Newsletter 72-75 (2008),  84-106.

2007 "The emergence of social complexity in the southern Chad Basin towards 500 BC: Archaeological and other evidence," Borno Museum Society Newsletter 68-71 (2007),  49-68.

2006 "The Mune as the Ark of the Covenant between Duguwa and Sefuwa [in ancient Kanem]", Borno Museum Society Newsletter 66-67 (2006), 15-25.

2004a  "Canaanite-Israelite background of the Chronicle of Kanem-Bornu", in: D. Lange, Ancient Kingdoms, 242-8.

2004b  "Spread of the Canaanite state to West Africa", in: D. Lange, Ancient Kingdoms, 277-287.

1993 "Ethogenesis from within the Chadic state: some thoughts on the history of Kanem-Borno", Paideuma 39, 261-277.

1987 “The Chad region as a crossroads”, in: M. al-Fasi (ed.), General History of Africa (UNESCO), vol. III, 436-460.

1984 “The kingdoms and peoples of Chad”, in: D. T. Niane (ed.), General History of Africa, (UNESCO), vol. IV, Paris, 238-265.

2005 "Staatengründungen in Westafrika"

1987 A Sudanic Chronicle: The Bornu Expeditions of Idris Alauma (1564-1576, Stuttgard 1987. 

1977 Chronologie et histoire d'un royaume africain: le diwan des sultans du Kanem-Bornu, Wiesbaden 1977.

-- "Ethnogenesis from within the Chadic state. Some thoughts on the history of Kanem-Borno", Paideuma 39 (1993), 261-277 (reprinted in Lange Ancient Kingdoms, 137-153;  comments, 555-7). 

1997 "Bornu region, history", J. Middelton (ed.), Encyclopaedia of Subsaharan Africa, Bd. I, New York, 189-190.

1992 "Ethnogenesis and the state in the Lake Chad region", in: E. B. Ruano und M. E. Burgos (eds.), 17e Congrès International des Sciences Historiques, Madrid, 651-660.

1990 "Die Königinmutter im Tschadseegebiet: historische Betrachtungen", Paideuma 36, 139-156.

1989 "Préliminaires à une histoire des Sao", Journal of African History 30, 189-210 (reprinted in D. Lange, Ancient Kingdoms, 115-136;  comments, 554-5). 

1988 "Trois hauts dignitaires bornoans du XVIe siècle: le Digma, le grand Jarma et le Cikama", Journal of African History  29, 177-189 (reprinted in Lange Ancient Kingdoms, 101-113; comments, 552-4). 

1987c Contribution à l'histoire médiévale du Borno et des États Hausa, Thèse de Doctorat d'État, Paris-Sorbonne, directed by J. Devisse and E. Haberland (not publ.).

1984 "The kingdoms and peoples of Chad", in: D. T. Niane (ed.), General History of Africa, (UNESCO), vol. IV, Paris, 238-265.

1982 "L'éviction des Sefuwa du Kanem et l'origine des Bulala", Journal of African History 23, 315-331 (reprinted in Lange Ancient Kingdoms, 83-99; comments, 551-2). 

1980 "La région du lac Tchad d'après la Géographie d'Ibn Sa'id: texte et cartes", Revue d'Islamologie 16, 149-181.

1979a "Les lieux de sépulture des rois sefuwa (Kanem-Bornu)", Paideuma 25, 145-57 (reprinted in Lange Ancient Kingdoms, 69-81; comments, 550-1). 

1979b "Un texte de Maqrizi sur les 'races des Sudan'", Revue d'Islamologie 15, 187-209.

1979c (mit R. O'Fahey und J. Hunwick) "Two glosses concerning the Bilad al-Sudan on a manuscript of al-Nuwayri's Nihayat al-'Arab", Bulletin d'Information, Fontes Historiae Africanae 5, 16-24.

1978a "Progrès de l'Islam et changements politiques au Kanem du XIe au XIIIe siècle: un essai d'interprétation", Journal of African History 19 (4), 495-513 (reprinted in Lange Ancient Kingdoms, 49-67;  comments, 549-550). 

 1978b "Quelques remarques sur le Kitab ghazawat Barnu", Bulletin d'Information, Fontes Historiae Africanae 4, 45-7.

1977b (mit S. Berthoud) "Al-Qasaba et d'autres villes de la route centrale du Sahara", Paideuma 23, 181-200 (reprinted in Lange Ancient Kingdoms, 13-34; comments, 565-7).

1974 Contribution à l'histoire dynastique du Kanem-Bornu (des origines jusqu'au début du XIXe siècle), Thèse de 3ème Cycle dirigée par R. Mauny, Paris-Sorbonne (publ. 1977a).

1972a "Un vocabulaire kanuri de la fin du XVIIe siècle", Cahiers d'Études Africaines 12 (2), 277-90.

 1972b (with S. Berthoud) "L'intérieur de l'Afrique Occidentale d'après Giovanni Lorenzo Anania (XVIe siècle)", Cahiers d'Histoire Mondiale 14 (2), 299-250.

The history of Kanem-Bornu is also considered in:

2004 "Reflections of the Canaanite-Israelite dualistic world view in the written records of the Central Sudan", in D. Lange, Ancient Kingdoms of West Africa: Africa-Centred and Canaanite-Israelite Perspectives, J. Röll, Dettelbach 2004, 242-254.

1993 "Die Hausa-Tradition in ihrer Abhängigkeit von Kanem-Borno und Nubien", Anthropos 88, 47-76.