Holman, H.T. “Olive Heffernan, The High Seas: Ambition, Power and Greed on the Unclaimed Ocean”. The Northern Mariner / Le marin du nord 34, no. 4 (June 30, 2025): 594–595. Accessed July 3, 2025. https://tnm.journals.yorku.ca/index.php/default/article/view/1328.