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Toyang, Ngeh J., Eugene N. Ateh, Harry Davis, Pierre Tane, Luc B. Sondengam, Joseph Bryant, and Rob Verpoorte. "In Vivo Antiprostate Tumor Potential of Vernonia Guineensis Benth. (Asteraceae) Tuber Extract (VGDE) and the Cytotoxicity of Its Major Compound Pentaisovaleryl Sucrose." J Ethnopharmacol 2013.

Toyang, Ngeh J., et al. "In Vivo Antiprostate Tumor Potential of Vernonia Guineensis Benth. (Asteraceae) Tuber Extract (VGDE) and the Cytotoxicity of Its Major Compound Pentaisovaleryl Sucrose." J Ethnopharmacol 2013.