1. A preliminary inventory of plants used for psychoactive purposes in southern African healing traditions. (2002). Transactions of the Royal Society of South Africa. 57 (1&2), 1-24.
2. A review of plants used in divination in Southern Africa and their psychoactive effects. (2008). South African Humanities. 20: 333–351.
3. Psychoactive ubulawu spiritual medicines and healing dynamics in the initiation process of Southern Bantu diviners. (2012). Journal of Psychoactive Drugs. 44:3, 216-223.
4. An account of healing depression using Ayahuasca plant teacher medicine in a Santo Daime ritual. (Pre-release 2013). Indo Pacific Journal of Phenomenology. 12:1, 1-12.