| web | http://www.npr.org/sections/thetwo-way/2017/07/13/537040868/ravens-surprise-scientists-by-showing-they-can-plan |
| author | Merrit Kennedy |
| publication | NPR |
| date | 2017-07-13 |
| web | Can Kabadayi, Mathias Osvath | Science | 2017-07-14 | |
| web | Markus Boeckle, Nicola S. Clay... | Science | 2017-07-14 | |
| web | George Dvorsky | Gizmodo | 2017-07-13 |
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