AUTHOR=Boonstra Tjeerd W., He Biyu J., Daffertshofer Andreas TITLE=Scale-free dynamics and critical phenomena in cortical activity JOURNAL=Frontiers in Physiology VOLUME=4 YEAR=2013 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2013.00079 DOI=10.3389/fphys.2013.00079 ISSN=1664-042X