Ramesh Petchi R., Vijaya C., Parasuraman S., Alagu Natchiappan, and Devika GS, “Anti-arthritic effect of ethanolic extract of leaves of Vitex negundo Linn., (Verbenaceae) in male albino Wistar rats”, Int. J. Res. Pharm. Sci., vol. 2, no. 2, pp. 213–218, May 2011.