Tomlins, Keith, Bennett, Ben, Stathers, Tanya ORCID: 0000-0002-7767-6186 , Linton, John, Onumah, Gideon, Coote, Hilary, Kleih, Ulrich, Priebe, Jan and Bechoff, Aurelie ORCID: 0000-0001-8141-4448 (2016) Reducing postharvest losses in the OIC member countries. COMCEC Agricultural Working Group. pp. 1-194.

Ton, Giel, de Grip, Karin, Lançon, Frédéric, Onumah, Gideon E. and Proctor, Felicity J. (2014) Empowering smallholder farmers in markets: strengthening the advocacy capacities of national farmer organisations through collaborative research. Food Security, 6 (2). pp. 261-273. ISSN 1876-4517 (Print), 1876-4525 (Online) (doi:https://doi.org/10.1007/s12571-014-0339-3)

Meijerink, Gerdien, Onumah, Gideon and Posthumus, Helena (2011) Innovations in risk insurance models. Discussion Paper. Agrinatura / ESFIM, Paris, France.

Adebayo, K., Abayomi, L., Abass, A., Dziedzoave, N.T., Forsythe, L. ORCID: 0000-0001-9931-4453 , Hillocks, R.J., Gensi, R., Gibson, R.W., Graffham, A.J., Ilona, P., Kleih, U.K., Lamboll, R.I., Mahende, G., Martin, A.M. ORCID: 0000-0001-9305-7302 , Onumah, G.E., Orr, A.W., Posthumus, H., Sanni, L.O., Sandifolo, V. and Westby, A. (2010) Sustainable inclusion of smallholders in the emerging high quality cassava flour value chains in Africa: challenges for agricultural extension services. Journal of Agricultural Extension, 14 (1). pp. 1-10. ISSN 1119-944X

Coulter, J. and Onumah, G. (2002) The role of warehouse receipt systems in enhanced commodity marketing and rural livelihoods in Africa. Food Policy, 27 (4). pp. 319-337. ISSN 0306-9192 (doi:https://doi.org/10.1016/S0306-9192(02)00018-0)

Goodland, Andrew, Onumah, Gideon, Amadi, Juliana and Griffith, Geoffrey (1999) Rural finance. Natural Resources Institute Policy Series (1) . Natural Resources Institute, Chatham Maritime, Kent, UK. ISBN 0859545075