Collinson, C.D., Kleih, U., Burnett, D.G., Ferris, R.S.B., Jagwe, J.N. and Muganga, A.K. (2002) Transaction cost analysis. Final report. Technical Report. Natural Resources Institute, Chatham, UK.

Ferris, R.S.B., Collinson, C., Wanda, K., Jagwe, J. and Wright, P. (2001) Evaluating the marketing opportunities for shea nut and shea nut processed products in Uganda. Technical Report. Natural Resources Institute, Chatham, UK.

Compton, Julia A.F., Ofosu, Anthony, Magrath, Priscilla A., Motte, Felix F., Acquaye, Kenneth, Addo, Samuel and Boxall, Robin A. (1998) Rapid assessment methods for small farm storage surveys. In: Post-Harvest Technology and Commodity Marketing: Proceedings of a Postharvest Conference - 2[9] Nov to 1 Dec 1995, Accra, Ghana. International Institute of Tropical Agriculture, Ibadan, Nigeria, pp. 187-198. ISBN 978-131-111-8