C. G. Achionye-Nzeh and O. G. Omoniyi, “Lipid composition of the fishes <i>Heterotis niloticus</i>, <i>Brycenus nurse</i>,<i>Gnathonemus cyprinoides</i> and <i>Sarotherodon galilaeus</i> from a small lake in Nigeria”, Rev. Biol. Trop., vol. 50, no. 1, pp. 253–257, Mar. 2002.