TY  - RPRT
TI  - Heart rate variability and work-load measurement.
AU  - W Rohmert
AU  - W Laurig
AU  - U Philipp
AU  - H Luczak
PY  - 1973
DO  - 10.1080/00140137308924480
UR  - https://pubmed.ncbi.nlm.nih.gov/4702061/
ID  - 4702061
ER  -