TY  - RPRT
TI  - Issues in designing flexible trials.
AU  - Martin Posch
AU  - Peter Bauer
AU  - Werner Brannath
PY  - 2003
DO  - 10.1002/sim.1455
UR  - https://pubmed.ncbi.nlm.nih.gov/12627412/
ID  - 12627412
ER  -