Jeffries, G., O. Withers, C. Barichievy, and C. Gordon. “The Rhino Impact Investment Project—a New, Outcomes-Based Finance Mechanism for Selected AfRSG-Rated ‘Key’ Black Rhino Populations”. Pachyderm, vol. 60, Nov. 2019, pp. 88-95, https://pachydermjournal.org/index.php/pachyderm/article/view/38.