Wild, L. A., and C. Gabriele. “Putative Contact Calls Made by Humpback Whales (Megaptera Novaeangliae) in Southeastern Alaska”. Canadian Acoustics, vol. 42, no. 4, Oct. 2014, p. 23-31, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2637.