Belem-Pinheiro, M.-L., Imbiriba da Rocha, A. F., Quetin-Leclercq, J., Wauters, J.-N., & Angenot, L. (1988). Alkaloids of Rauwolfia sellowii from Amazonia. Journal de Pharmacie de Belgique, 43(5), 379-381. https://hdl.handle.net/2078.5/151131 (Original work published 1988)