TY  - RPRT
TI  - Multi-level repeated measures growth modelling using extended spline functions.
AU  - H Pan
AU  - H Goldstein
PY  - 1998
DO  - 10.1002/(sici)1097-0258(19981215)17:23<2755::aid-sim41>3.0.co;2-e
UR  - https://pubmed.ncbi.nlm.nih.gov/9881421/
ID  - 9881421
ER  -