Lyimo, T. J., E. F. Mvungi, C. Lugomela, and M. Björk. “Seagrass Biomass and Productivity in Seaweed and Non-Seaweed Farming Areas in the East Coast of Zanzibar”,. Western Indian Ocean Journal of Marine Science, vol. 5, no. 2, Oct. 2007, pp. 141-52, doi:10.4314/wiojms.v5i2.28506.