TY  - RPRT
TI  - Fixed coupling: different mechanisms revealed by exercise-induced changes in cycle length.
AU  - E L Michelson
AU  - J Morganroth
AU  - J F Spear
AU  - J A Kastor
AU  - M E Josephson
PY  - 1978
DO  - 10.1161/01.cir.58.6.1002
UR  - https://pubmed.ncbi.nlm.nih.gov/709757/
ID  - 709757
ER  -