1. Adejuwon, J. O., Balogun, E. E., & Adejuwon, S. A. (1990). On the annual and seasonal patterns of rainfall fluctuations in sub-Sahara West Africa. International Journal of Climatology, 10, 839–846.
2. Aghamelu, O. P., & Okogbue, C. O. (2011). Geotechnical assessment of road failures in the Abakiliki area Southeasten Nigeria. International Journal of Civil and Environmental Engineering, 11(2), 12–21.
3. Aghamelu, O. P., Nnebo, P. N., & Ezeh, H. N. (2011). Geotechnical and environmental problems related to shales in the Abakaliki area, Southeastern Nigeria. African Journal of Environmental Science and Technology, 5(2), 80–88.
4. Akpokodje, E. G. (1986). The stabilization of some soils zone with cement and lime. Q.J Engineering Geology, 20, 287–296.
5. Anyadaike, R. N. C., & Phil-Eze, P. O. (1989). Runoff response to basin parameters in Southern Nigeria. Geografiska Annaler, 71A(1–2), 75–84.