I. Akpan, D. Ama-Abas, E. Obiajunwa, and F. Adebiyi, “Element characterization of african cuttlefish, <i>Sepia bertheloti</i> from the coastal waters off Qua Iboe River, Nigeria, using energy dispersive x-ray flourescence technique”, Nig J Phys, vol. 20, no. 2, Sep. 2009.