Obeten Offem, B., Akegbejo Samsons, Y. and Tunde Omoniyi, I. 2008. Diet, size and reproductive biology of the silver catfish, Chrysichthys nigrodigitatus (Siluformes: Bagridae) in the Cross River, Nigeria. Revista de Biología Tropical. 56, 4 (Dec. 2008), 1785–1799. DOI:https://doi.org/10.15517/rbt.v56i4.5759.