Nwakanma, H. O, Okorafor-Nwosu, A, Nwamba, H. O, and Ichu, B. C., “Muscle deoxyribonucleic acid (DNA) concentration response to sublethal effect of ethanol extract of Nicotiana tobacum on juvenile African catfish (Clarias gariepinus)”, PIJ, vol. 3, no. 3, pp. 73–80, Sep. 2020.