TY  - RPRT
TI  - The development of the pacemaker.
AU  - J A Hopps
PY  - 1981
DO  - 10.1111/j.1540-8159.1981.tb03682.x
UR  - https://pubmed.ncbi.nlm.nih.gov/6171784/
ID  - 6171784
ER  -