TY  - RPRT
TI  - Variability in planning and assessment: statistical considerations and models.
AU  - William M Rand
PY  - 2004
DO  - 10.1093/jn/134.6.1610s
UR  - https://pubmed.ncbi.nlm.nih.gov/15173439/
ID  - 15173439
ER  -