TY  - RPRT
TI  - Digital heart rate meter using c.m.o.s. devices.
AU  - A K George
AU  - A E Marble
PY  - 1981
DO  - 10.1007/bf02441325
UR  - https://pubmed.ncbi.nlm.nih.gov/7321625/
ID  - 7321625
ER  -