Der ruhelose Kontinent : ein Schlüssel zur Geschichte und Wirtschaft aller afrikanischen Länder

Pawnship in Africa : dept bondage in historical perspective

Falola, Toyin, (1994)

Slavery and the rise of the Atlantic system : [... originally presented at a conference on "Slavery and the Rise of the Atlantic System", held at Harvard University on September 4-5, 1988]

Solow, Barbara L., (1993)

Precolonial Black Africa : a comparative study of the political and social systems of Europe and Black Africa, from antiquity to the formation of modern states

Diop, Cheikh Anta, (1987)