Roberto Lelli

Insect-antifeedant and antibacterial activity of diterpenoids from species of Plectranthus.

M. Simmonds, T. Kokubun, R. Grayer, 2006, Phytochemistry.

Phenolic and Terpenoid Constituents from the Sri Lankan Medicinal Plant Osbeckia aspera.

M. Simmonds, R. Hughes, S. Bretherton, 2008 .