TY  - RPRT
TI  - Photoelectric plethysmography using reflected light.
AU  - J NIEVEEN
AU  - W J REICHERT
AU  - L B VAN DER SLIKKE
PY  - 1956
DO  - 10.1159/000165601
UR  - https://pubmed.ncbi.nlm.nih.gov/13374718/
ID  - 13374718
ER  -