TY  - RPRT
TI  - Guidelines on statistical methods.
AU  - S J Day
AU  - S J Evans
PY  - 1988
DO  - 10.1016/0300-5712(88)90013-9
UR  - https://pubmed.ncbi.nlm.nih.gov/3165996/
ID  - 3165996
ER  -