@misc{indiciaec292863d6c2c, title = {Facial and jaw-elevator EMG activity in relation to changes in performance level during a sustained information processing task.}, author = {W Waterink and A van Boxtel}, year = {1994}, doi = {10.1016/0301-0511(94)90001-9}, url = {https://pubmed.ncbi.nlm.nih.gov/7948464/}, note = {Source identifier: 7948464} }