TY - RPRT TI - Circadian rhythms in cognitive performance: methodological constraints, protocols, theoretical underpinnings. AU - Katharina Blatter AU - Christian Cajochen PY - 2006 DO - 10.1016/j.physbeh.2006.09.009 UR - https://pubmed.ncbi.nlm.nih.gov/17055007/ ID - 17055007 ER -