1. Abegunrin, O. O.: Causes of Borehole Failures in the Basement Complex Rocks of SW Nigeria, Unpublished B.Sc. Thesis, Department of Geology, Obafemi Awolowo University, Ile-Ife, 56 p., 1990.
2. Adegoke-Anthony, C. W.; Ajayi, O.: Drilling Techniques for Groundwater in the Basement Complex Rocks of SW Nigeria. Journ. Min. Geol. 26: 171–181 (1989)
3. Agid News: International Groundwater Engineering Conference on the Monitoring, Maintenance and Rehabilitation of Water Supply Boreholes and Irrigation Tubewells. News Snippets 58, 8 (1989)
4. Ajayi, O.; Adegoke-Anthony, C. W.: Groundwater Prospects in the Basement Complex Rocks of SW Nigeria. Jour. Afr. Earth Science 7:227–235 (1988)
5. Ayoade, J. O.: Water resources and their development in Nigeria, Hydrological Sciences. Bulletin des Sciences Hydrologiques XX, 4, 581–589 (1975)