TY  - RPRT
TI  - Heart-rate conditioning, time estimation, and arousal level: exploratory study.
AU  - K D Marum
AU  - J Macintyre
AU  - R Armstrong
PY  - 1972
DO  - 10.2466/pms.1972.34.1.244
UR  - https://pubmed.ncbi.nlm.nih.gov/5011828/
ID  - 5011828
ER  -