Baker, R.L., Yola, Z., 'The Higis of the Bazza clan', Nigeria Magazine 47, 1955:213-222.

Barkindo, B.M., Outline of Mandara history to 1900 AD, PhD-dissertation, Ahmadu Bello University, Kano 1973.

Barkindo, B., 'Islam in Mandara, its introduction and impact upon the state and the people', Kano Studies N.S. 1(4), 1979:24-51.

Barkindo, B., 'Mandara-Fombina relations before 1900', Kano Studies (A Bayero University Journal of Savanna and Sudanic Reseach) N.S. 2(1), 1980:84-95.

Barkindo, B., 'Political centralization in the south of Borno, the case of Sukur in the 18th and 19th centuries', Evolutuion of political culture in Nigeria, (eds) J.F. Ade Ajayi & B. Ikara, University Press Ltd, Ibadan 1985:50-66.

Barkindo, B., 'The Mandara astride the Nigeria-Cameroon boundary', Partitioned Africans, ethnic relations across Africa's international boundaries 1884-1984, (ed) A.I. Asiwaju, C.Hurst & Co, London 1985:29-49.

Barkindo, B., The Sultanate of Mandara to 1902, History of the Evolution, Development and Collapse of a Sudanese Kingdom, Studien zur Kulturkunde, Franz Steiner Verlag, Stuttgart 1989.