TY  - RPRT
TI  - Sample size determination in studies with matched pairs.
AU  - J L Fleiss
AU  - B Levin
PY  - 1988
DO  - 10.1016/0895-4356(88)90158-8
UR  - https://pubmed.ncbi.nlm.nih.gov/3418361/
ID  - 3418361
ER  -