TY  - RPRT
TI  - Sample sizes calculations for ordered categorical data.
AU  - J Whitehead
PY  - 1996
DO  - 10.1002/(sici)1097-0258(19960530)15:10<1065::aid-sim288>3.0.co;2-9
UR  - https://pubmed.ncbi.nlm.nih.gov/8783443/
ID  - 8783443
ER  -