1. A preliminary chemotaxonomic review of Kopsia (Apocynaceae)
2. in ‘Alkaloids: Chemical and Biological Perspectives’, Ed. S. W. Pelletier, Pergamon, Amsterdam, 1999, Vol. 14, Chap. 2, p. 285–435.
3. , in ‘The Alkaloids’, Ed. G. A. Cordell, Academic Press, Amsterdam, 2006, Vol. 63, p. 181–337.