TY  - RPRT
TI  - Graphical and statistical techniques for cardiac cycle time (phase) dependent changes in interbeat interval: problems with the Jennings et al. (1991) proposals.
AU  - R J Barry
PY  - 1993
DO  - 10.1016/0301-0511(93)90092-m
UR  - https://pubmed.ncbi.nlm.nih.gov/8435453/
ID  - 8435453
ER  -