TY  - RPRT
TI  - Concepts of interaction.
AU  - K J Rothman
AU  - S Greenland
AU  - A M Walker
PY  - 1980
DO  - 10.1093/oxfordjournals.aje.a113015
UR  - https://pubmed.ncbi.nlm.nih.gov/7424895/
ID  - 7424895
ER  -