TY  - RPRT
TI  - Selecting concomitant variables using a likelihood ratio step-down procedure and a method of testing goodness of fit in an exponential survival model.
AU  - R A Greenberg
AU  - S Bayard
PY  - 1974
UR  - https://pubmed.ncbi.nlm.nih.gov/4429758/
ID  - 4429758
ER  -