Bopardikar I, Sutaria D, Sule M, ym. Description and classification of Indian Ocean humpback dolphin ( Sousa plumbea               ) whistles recorded off the Sindhudurg coast of Maharashtra, India. Marine Mammal Science. 2018;34(3):755 - 776. Available at: http://doi.wiley.com/10.1111/mms.v34.3.

Hudson EJ, Shizuka D. Introductory whistle is sufficient for early song recognition by golden-crowned sparrow nestlings. Animal Behaviour. 2017;133:83 - 88. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0003347217303056.

Rankin S, Archer F, Keating JL, ym. Acoustic classification of dolphins in the California Current using whistles, echolocation clicks, and burst pulses. Marine Mammal Science. 2016. Available at: http://doi.wiley.com/10.1111/mms.12381.