AUTHOR=Agrillo Christian , Beran Michael J. TITLE=Number without language: comparative psychology and the evolution of numerical cognition JOURNAL=Frontiers in Psychology VOLUME=4 YEAR=2013 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2013.00295 DOI=10.3389/fpsyg.2013.00295 ISSN=1664-1078