Matthews , J. “Method for Estimating Sperm Whale Abundance from an Acoustic Strip Transect Survey With a Two-Element Towed Hydrophone”. J. Cetacean Res. Manage. 14, no. 1 (February 1, 2023): 159–170. Accessed June 7, 2023. https://stage.tae.netxtra.net/index.php/jcrm/article/view/532.