Best, Peter B., Anabela Brandão, and Doug S. Butterworth. “Demographic Parameters of Southern Right Whales off South Africa”. J. Cetacean Res. Manage. (October 30, 2020): 161–169. Accessed September 28, 2025. https://journal-iwc-live.netxtra.dev/index.php/jcrm/article/view/296.