1. Acheampong, S. Y., & Hess, J. W. (2000). Origin of the shallow groundwater system in the southern Voltaian Sedimentary Basin, Ghana. Hydrogeology Journal, 6(2000), 527–537.
2. Adomako, D., Maloszewski, P., Stumpp, C., Osae, S., & Akiti, T. T. (2010a). Estimating groundwater recharge from water isotope (δ 2H, δ18O) depth profiles in the Densu River basin, Ghana. Hydrological Sciences Journal, 55(8), 1405–1416.
3. Adomako, D., Osae, S., Akiti, T. T., Faye, S., & Maloszewski, P. (2010b). Geochemical and isotopic studies of groundwater conditions in the Densu River Basin of Ghana. Environmental Earth Science. doi: 10.1007/s12665-010-0595-2 .
4. Akiti, T. T., (1986). Environmental isotope study of groundwater in crystalline rocks of the Accra Plains. In: 4th working meeting on isotopes in nature. Proceedings of an advisory group meeting. Vienna: IAEA.
5. Al-Gamal, S. A. (2011). An assessment of recharge possibility to North-Western Sahara Aquifer System (NWSAS) using environmental isotopes. Journal of Hydrology, 398, 184–190.