TY  - RPRT
TI  - Closed testing procedures for group sequential clinical trials with multiple endpoints.
AU  - D I Tang
AU  - N L Geller
PY  - 1999
DO  - 10.1111/j.0006-341x.1999.01188.x
UR  - https://pubmed.ncbi.nlm.nih.gov/11315066/
ID  - 11315066
ER  -