TY  - RPRT
TI  - Sample size recalculation in internal pilot study designs: a review.
AU  - Tim Friede
AU  - Meinhard Kieser
PY  - 2006
DO  - 10.1002/bimj.200510238
UR  - https://pubmed.ncbi.nlm.nih.gov/16972704/
ID  - 16972704
ER  -