TY  - RPRT
TI  - Identifiability, exchangeability, and epidemiological confounding.
AU  - S Greenland
AU  - J M Robins
PY  - 1986
DO  - 10.1093/ije/15.3.413
UR  - https://pubmed.ncbi.nlm.nih.gov/3771081/
ID  - 3771081
ER  -