TY  - RPRT
TI  - Cardiovascular autonomic function testing: an automated method for measuring heart rate variation.
AU  - I A O'Brien
AU  - R J Corrall
PY  - 1985
DO  - 10.1111/j.1464-5491.1985.tb00620.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2952401/
ID  - 2952401
ER  -