TY - RPRT TI - Graphical and statistical techniques for cardiac cycle time (phase) dependent changes in interbeat interval. AU - J R Jennings AU - M W van der Molen AU - R J Somsen AU - K R Ridderinkhof PY - 1991 DO - 10.1111/j.1469-8986.1991.tb02001.x UR - https://pubmed.ncbi.nlm.nih.gov/1758935/ ID - 1758935 ER -