Discrimination of holograms and real objects by pigeons (Columba livia) and humans (Homo sapiens)
Journal of Comparative Psychology (2014) - Comment
pubmed: 25133466  doi: 10.1037/a0036874  issn: 1939-2087  issn: 0735-7036 

Claudia Stephan, Michael M. Steurer, Ulrike Aust