M. C. Calijuri, A. C. A. Dos Santos and S. Jati, “Temporal Changes in the Phytoplankton Community Structure in a Tropical and Eutrophic Reservoir (Barra Bonita, S.P. Brazil),” Journal of Plankton Research, Vol. 24, 2002, pp. 617-634. doi:10.1093/plankt/24.7.617
 W. D. Taylor, E. Kebede and Z. Gebre-Mariam, “Primary and Secondary Production in the Pelagic Zone of Ethiopian Rift Valley Lakes,” In: C. Tudorancea and W. D. Taylor, Eds., Ethiopian Rift Valley Lakes, Backhuys Publishers, Leiden, 2002, pp. 95-108.
 N. Atnafu, E. Dejen and J. Vijverberg, “Assessment of the Ecological Status and Threats of Welala and Shesher Wetlands, Lake Tana Sub-Basin (Ethiopia),” Journal of Water Resource and Protection, Vol. 3, No. 3, 2011, pp. 540-547. doi:10.4236/jwarp.2011.37064
 A. Getahun, E. Dejen and W. Anteneh, “Fishery Studies of Ribb River, Lake Tana Basin, Ethiopia,” Ethiopian Nile Irrigation and Drainage Project Coordination Office, Ministry of Water Resources, Final Report E1573, Vol. 2, Addis Ababa, 2008.
 T. Alemayehu, M. McCartney and S. Kebede, “The Wa- ter Resource Implications of Planned Development in the Lake Tana Catchment, Ethiopia,” Ecohydrology and Hydro- biology, Vol. 10, No. 2-4, 2010, pp. 211-222. doi:10.2478/v10104-011-0023-6
 W. Anteneh, E. Dejen and A. Getahun, “Shesher and Welala Floodplain Wetlands (Lake Tana, Ethiopia): Are They Important Breeding Habitats for Clarias gariepinus and the Migratory Labeobarbus Fish Species?” The Scientific World Journal, Vol. 2012, 2012, Article ID: 298742.
 B. Kibret, “In Situ Characterization of Local Chicken Eco-Type for Functional Traits and Production System in Fogera Woreda, Amhara Regional State,” MSc. Thesis, Haramaya University, Haramaya, 2008.
 A. Wondie, S. Mengistu, J. Vijverberg and E. Dejen, “Seasonal Variation in Primary Production of a Large High Altitude Tropical Lake (Lake Tana, Ethiopia): Effects of Nutrient Availability and Water Transparency,” Aquatic Ecology, Vol. 41, No. 2, 2007, pp. 195-207. doi:10.1007/s10452-007-9080-8
 Z. Dessalegn, “Temporal Dynamics of Biomass and Primary Production of Phytoplankton in Relation to Some Phsico-Chemical Factors in Lake Koriftu, Ethiopia,” MSc. Thesis, Addis Ababa University, Addis Ababa, 2007.