TY  - RPRT
TI  - Active control equivalence trials: some methodological aspects.
AU  - U Ferner
AU  - N Neumann
PY  - 1992
DO  - 10.1007/bf02246246
UR  - https://pubmed.ncbi.nlm.nih.gov/1546152/
ID  - 1546152
ER  -