TY  - RPRT
TI  - Estimation and sample size considerations for clustered binary responses.
AU  - E W Lee
AU  - N Dubin
PY  - 1994
DO  - 10.1002/sim.4780131206
UR  - https://pubmed.ncbi.nlm.nih.gov/7973205/
ID  - 7973205
ER  -