TY  - RPRT
TI  - Sample size calculation for complex clinical trials with survival endpoints.
AU  - J H Shih
PY  - 1995
DO  - 10.1016/s0197-2456(95)00132-8
UR  - https://pubmed.ncbi.nlm.nih.gov/8720017/
ID  - 8720017
ER  -