Apetrei, Cristian, Michael J Metzger, David Richardson, Binhua Ling, Paul T Telfer, Patricia Reed, David L Robertson, and Preston A Marx. 2005. “Detection and Partial Characterization of Simian Immunodeficiency Virus SIVsm Strains from Bush Meat Samples from Rural Sierra Leone”. Journal of Virology 79 (4): 2631-36.