Dogs (Canis familiaris), but Not Chimpanzees (Pan troglodytes), Understand Imperative Pointing Kirchhofer, Katharina C. ; Zimmermann, Felizitas ; Kaminski, Juliane ; Tomasello, Michael Abstract Publication: PLoS ONE Pub Date: February 2012 DOI: 10.1371/journal.pone.0030913 Bibcode: 2012PLoSO...730913K