Underwater observations of dolphin reactions to a distressed conspecific
Learning & Behavior (2015) - Comment
pubmed: 25898942  doi: 10.3758/s13420-015-0179-9  issn: 1543-4508  issn: 1543-4494 

Stan A. Kuczaj, Erin E. Frick, Brittany L. Jones, James S. E. Lea, Dan Beecham, Fabrice Schnöller