1. Adam, S., 1994. Small Enterprises and Apprenticeship Training in Ibadan, Nigeria: An Interim Report. African Discussion Paper No. 4. African Studies Group at the University of Bremen/Information Centre Africa, Bremen, Germany.
2. Technology and the Environment in Sub-Saharan Africa: Emerging Trends in the Nigerian Manufacturing Industry;Adeoti,2002
3. Bessant, J., 1999. Getting the Tail to Wag: Enabling Innovation in Small and Medium-sized Enterprises. In: Szirmai, A., Halman, J., Verspagen, B. (Eds.), Innovation in Theory and Practice, Papers of the ECIS Opening Conference. Technische Universiteit, Eindhoven, The Netherlands.
4. Boehm, U., Idler, H., 1992. Vocational Training in Nigeria: Project Planning Study, Berichte und Analysen Drette Welt, Nr. 3, Interdisziplinaeres Aufbaustudium Dritte Welt an der Universitaet Bremen und Nord-Sued Forum, Bremen, Germany.
5. Technical Change and Economic Theory,1988