TY  - RPRT
TI  - How normal is variable, or how variable is normal?
AU  - B C Touwen
PY  - 1993
DO  - 10.1016/0378-3782(93)90035-s
UR  - https://pubmed.ncbi.nlm.nih.gov/8275868/
ID  - 8275868
ER  -