TY  - RPRT
TI  - Progressively decreasing ectopic to second sinus beat intervals in concealed trigeminy.
AU  - V K Singh
PY  - 1987
DO  - 10.1016/s0022-0736(87)80028-6
UR  - https://pubmed.ncbi.nlm.nih.gov/2443591/
ID  - 2443591
ER  -