B.A. Amisigo, N. van de Giesen, C. Rogers, W.E.I. Andah, J. Friesen (2007). Monthly streamflow prediction in the Volta Basin of West Africa: A SISO NARMAX polynomial modeling. J. Phys. Chem. Earth (2007), doi:10.1016/j.pce.2007.04.019.
Amisigo, B. A. , van de Giesen, N. and Andah, W. E. I. (2006). A Hybrid Metric-Conceptual (HMC) Model for Monthly Riverflow Prediction in the semi-arid Volta Basin of West Africa. Int. J. River Basin Management. Vol. 5, No. 2 (2006), pp. 1- 12.
Manful, D. Y., Rogers, C. and Amisigo, B. A. (2006). Drought analysis of African rivers: a study of non-stationary low-flow trends in the Volta and Nile. Proceedings of the 7th International Conference on HydroScience and Engineering, Philadelphia, USA. September 10-13, 2006, ISBN: 0977447405
Amisigo, B. A. and van de Giesen, N. C. (2005). Using a spatio-temporal dynamic state-space model with the EM algorithm to patch gaps in daily riverflow series. Hydrology and Earth System Sciences, 9: 209–224