David Owolabi, O. “The Dietary Habits of the Upside-down Catfish, Synodontis Membranaceus (Osteichthyes: Mochokidae) in Jebba Lake, Nigeria”. Revista De Biología Tropical, vol. 56, no. 2, June 2008, pp. 931–936, doi:10.15517/rbt.v56i2.5634.