1. AGGARWAL, V. D. Research on cowpea Striga resistance at IITA. Proceedings of a Workshop by IITA, ICRISAT and IDRC. August22-241988. Combating Striga in Africa, Edited by: Kim, S. K. pp.90–95. Ibadarc: IITA.
2. AKINTUNDE, A. Y., OBIGBESAN, G. O. and KIM, S. K. Nitrogen-use efficiency and grain yield as influenced by nitrogen fertilization and hybrid maize varieties in selected agro-ecotogical zones of Nigeria. Proceedings of a Workshop by Maize Association of Nigeria (MAN). April3-41991. Maize Improvement Production and Utilization - The Way Forward, Edited by: Fakorede, M. A. B., Alofe, C. O. and Kim, S. K. pp.119–124. Ibadarc: MAN.
3. BEBAWI, F. F., KHALID, S. A. and MUSSELMAN, L. J. Effects of urea nitrogen on stimulant activity of sorghum and germination capacity of Striga. Proceedings of the Fifth International Symposium on Parasitic Weeds. June24-301991. Edited by: Ransom, J. K., Musselman, L. J., Worsham, A. D. and Parker, C. pp.458–461. Mexico City: CIMMYT.
4. MAIZE YIELD DETERMINANTS IN FARMER-MANAGED TRIALS IN THE NIGERIAN NORTHERN GUINEA SAVANNA