D. Walsh, P., Michael Fay, J., Gulick, S., & Phillipe Sounguet, G. . (2000). Humpback whale activity near Cap Lopez, Gabon. J. Cetacean Res. Manage., 2(1), 63–67. Retrieved from https://journal-iwc-live.netxtra.dev/index.php/jcrm/article/view/489