J. L. Keyombe, J. O. Malala, E. Waithaka, R. M. Lewo, and B. O. Obwanga, “Seasonal changes in length-weight relationship and condition factor of Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) (Cichlidae) in Lake Naivasha, Kenya”, Intl. J. Aquat. Biol., vol. 5, no. 1, pp. 7–11, Jan. 2017.