TY  - RPRT
TI  - Current status of the two-step exercise test.
AU  - A M Master
AU  - I Rosenfeld
PY  - 1968
DO  - 10.1016/s0022-0736(68)80003-2
UR  - https://pubmed.ncbi.nlm.nih.gov/5699498/
ID  - 5699498
ER  -