1. Fröhlich, W. 1940. Das afrikanische Marktwesen. Zeitschrift far Ethnologie. (An English translation was published in 1982 by the International Geographical Union.)
2. Hill, P. 1966. Notes on traditional market authority and market periodicity in West Africa. Journal of African History 7(2), 295–311.
3. Hill, P. 1985. Indigenous Trade and Market Places in Ghana 1962–4. Jos Oral History and Literature Texts, University of Jos, Nigeria.
4. International Geographical Union. 1977, 1979, 1985. Periodic Markets, Daily Markets and Fairs: a Bibliography. 1st 2 issues ed. R.J. Bromley, University College of Swansea; last issue ed. W. McKim, Towson State University, Maryland.
5. Meillassoux, C. (ed.) 1971. The Development of Indigenous Trade and Markets in West Africa. International African Institute, London: Oxford University Press.