AUTHOR=Bueno-Guerra Nereida TITLE=How to Apply the Concept of Umwelt in the Evolutionary Study of Cognition JOURNAL=Frontiers in Psychology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2018.02001 DOI=10.3389/fpsyg.2018.02001 ISSN=1664-1078