Lyimo, T. J., Mvungi, E. F., Lugomela, C. and Björk, M. (2007) “Seagrass Biomass and Productivity in Seaweed and Non-Seaweed Farming Areas in the East Coast of Zanzibar”, Western Indian Ocean Journal of Marine Science, 5(2), pp. 141–152. doi: 10.4314/wiojms.v5i2.28506.