@misc{indiciae744fdfab85b9, title = {Twenty-four-hour patterns in human performance, subjective and physiological variables and differences between morning and evening active subjects.}, author = {J E Fröberg}, year = {1977}, doi = {10.1016/0301-0511(77)90008-4}, url = {https://pubmed.ncbi.nlm.nih.gov/884171/}, note = {Source identifier: 884171} }