M. A. Akanmu, G. Olayiwola, O. E. Ukponmwan, and K. Honda, “ACUTE TOXICITTY AND SLEEP-WAKE EEG ANALYSIS OF STACHTARPHETA CAYENNENSIS (VERBENACEAE) IN RODENTS”, Afr J Tradit Complement Altern Med, vol. 2, no. 3, pp. 222 –, Jan. 2006.